Evar persistence adobe analytics. Dimensions overview. Evar persistence adobe analytics

 
Dimensions overviewEvar persistence adobe analytics  Evar- These are persistent variables

Keep in mind that persistence is based on report time processing, not. , only two duplicate endpoints of the original stream of data). An eVar can be visit-based and function similarly to cookies. @schmisajoe82 Marketing channels have different expiry settings and do not depend on specific eVar settings. Effective December 31, 2023, Adobe intends to discontinue Reports & Analytics and its accompanying reports and features. Adobe Analytics [Learn from your peers Webinar] Unlock the power of processing rules within Adobe Analytics (August 10th) Learn More. for eVar, they mentioned that it is a persistence variable which can be used to hold conversion related info. In contrast, metrics contain numeric values that tie to a dimension. Read real-world use cases of Experience Cloud products written by your peersIf we set a eVar to record Referrer, a Prop to record as well, May I have your help to a clear clarification on: Referrer, Referrer (eVar), Referrer (Prop) E. All eVar values sent to Adobe are stored, regardless of allocation. 2. Page one set evar (user logged in), then when user goes to next page evar follows them etc for as many pages they visit in that session. Click the Extensions tab, then click Catalog. . In analysis workspace we wanted to show only event2 for generating the report. As a result, it's important and useful to try and understand these differences when you. events=”event95″;User. Each row is one ‘hit’, a single request sent to Adobe Analytics data collection servers. With link arguments, s. Name: Each delimited value can contain a maximum of 255 characters (or less if using multi-byte characters). Testing Rules that Read Variables. SOLVED Persistence client context data in Analytics. Adobe Analytics Champions applications are now OPEN! Applications are open through June 2nd. All of the processing rules for the Marketing Channels reports will follow this basic structure. Example :@AronoeleS - Metrics can be confusing, no doubt. However, by default eVar persistence till visits and due to this nature of eVar, it has higher count as prop even if sending same values in b. They work similarly to eVars, except they can contain multiple values in the same hit. In your report suite settings, access your eVar's settings and toggle the reset option to turn it on. The persistence setting is configured on the Adobe Advertising back end, and your Adobe Account Team can change it. Go to the Rules tab, then click the desired rule (or create a rule). Timestamp data. Both Adobe Analytics and Google Analytics provide a way to customize the first view a user sees when they log in. The tag sends. Click Analytics > Admin >. products: If you have an eCommerce site, set this variable when a visitor views or purchases a product. Once an eVar reaches its expiration, it no longer receives. hi @vitalin58777. Go to the Extensions tab, then click Configure under Adobe Analytics. Advertising Cloud Analytics Audience Manager Campaign Classic v7 & Campaign v8 Campaign Standard Developer Cloud Extensibility Experience Cloud Experience Manager Sites & More Experience Platform Journey. . However, with increasing popularity of Tag Management Systems, using tags in Adobe Experience Platform is recommended. They may allow you to maintain and mange the flow and persistence. Select Event Type > DOM Ready (Note that the order of the rule is “50”) Click Keep Changes. See Mobile SDK overview for more information. Created for: User. What is Adobe Analytics? Adobe Analytics provides reporting, visualizations, and analysis of Customer Data that allows Customers to discover actionable insights. It is an approximation, but it is the most scalable option that Adobe offers for counting the dimension and using that for other reports as well. Created for: User. var y = new Object (); Assign valid Analytics properties to this object: y. eVars allow us to give context to our visitors’ behaviors (i. . On those instances, we use a single eVar to capture multiple values with a delimiter and segregate them by classification. Adobe offers an extension that allows you to use most commonly-used plug-ins with Adobe Analytics. Open the custom code editor and paste the plug-in code provided below into the edit window. Click Edit Settings > General > Processing Rules. Adobe Analytics provides certain standard out of box metrics which are in general applicable for all websites like page views, visits, visitors, time spent, for eCommerce – product views, cart additions, checkouts, reviews, orders, revenue etc etc. Also with 1000 events you can probably spare a couple to fire when this happens (ie old/bad data for the evar appears, fire an event in a processing rule and delete the value of the evar (or copy it to some debug eVar) and then you can go back and attempt to find where the old information is coming from pulling url’s, s_code versions etc. One way I have found to start working out where an eVar was set it to build a table in Adobe Workspace with custom link name or page in the left column, and the eVar instances metric, visits, and occurences along the top. If they are two offers if the user select the second offer we are overwriting eVar2 = offer 2. Sounds like you want to know the percentage of visits to Page1 where a user with an eVar1="Proposed" goes on to page2. Click the Data Elements tab, then click Add Data Element. For more information, please visit the documentation. Offline data with timestamps generated from a mobile device can be combined with live, non-timestamped data from a web page—or integrated with data from any platform using a client-side timestamp call. then adobe analytics server will set a timestamp at the time the server call was received by its server, then it will calculate the date based on the timezone settings of the report suite and the timestamp set at the time the server call. In your case because of #2 you are getting Unspecified in the eVar reports. Log in to Adobe Analytics and go to Admin > Report Suites. Page Type using the Adobe Analytics extension. The s. Any event is hit based, it does not persist after the hit. Next, replace the Button Id metric in your workspace that displays the ID of a Call to Action (CTA) button with the classification. It is a broad question: You can name an eVar report as you wish, but if you do not sent the correct value at the code level then the wrong values will be in the report. Only the new values will follow the altered expiration settings. Hits: Every time information is sent to Adobe, we call that a hit. Here are the dimensions and metrics you can use related to Marketing Channels: This is the recommended. 3) visit segment (before sequence) where „evarX-Instance does not equals 1“ then „evarX-Instance equals 1) it shows you all hits where evar is set (1) and either it is the first hit (2) or within a sequence of hits until the instance occurs (3) maybe this can be done a way easier, possibly by just 1 segment by combining the containers. "Props are for traffic reporting. Hi. Send timestamped data from a mobile app to a global report suite. pageType in AppMeasurement and the Analytics extension custom code editor. Click Add Condition and then select when the rule applies. These variables are used to track specific data elements that are. With this in mind, I’ll dive into specific channel examples for each of the channel tiers. Populate internal search. For a Traffic Variable, Occurrences = Instances and Page Views <= Instances. referrer variable with one of those values. For the benefit of the forum, the persistence of an evar can be controlled through the conversion variable manager. test 3: create fall-out using eVar Pagename AND eVar Pagename Instances exist. Configuring eVars is one of the most fundamental parts of your Adobe Analytics implementation. You can set page name to any string value, including data. because bas. void _logAnalytic() { locator<Analytics>() . It will either be a PageView Server Call (s. 29-07-2021 10:24 PDT. s. Hi , The eVar persistence happens on the Adobe Servers where the hits are processed. Adobe Analytics - Live Stream Add-on includes Live Stream triggers, Live Stream dashboards, and Live Stream data features. One would expect the eVar to save with all selected defaults, so this is one redundant step you have to take in order to avoid editing the eVar again. I am not very sure about this. When using the DTM data elements, their persistence (locally) can be set us. Targets. See How to implement Adobe Analytics using the Adobe Experience Platform Web SDK for more information. For the example above, Segment would set window. The Edge Network forwards that data to Adobe Analytics. This content is suitable for administrators, data analysts, marketers, developers, and architects. For a Conversion Variable, Occurrences >= Page Views >= Instances. Locate the eVars section. Set the Extension drop-down list to Adobe Analytics, and the Action Type to Set Variables. Log in to the Adobe Experience Cloud and select Adobe Analytics. Given your reporting requirements, instead of breaking down by the "utm_campaign" eVar, could you breakdown by Marketing Channel. 3. 3. b. cust_visid represents a value set in s. Implementations that do not use the Analytics source connector, but rely on the Experience Platform Web SDK for digital data collection, can use the Experience Edge Geo Lookup service . The Target variable sent to Analytics has a default 90-day expiration. Set the Extension drop-down list to Adobe Analytics, and the Action Type to Set Variables. A very common use case would be to use this. You can also access documentation for product and user administration, implementation, and all the features. is it possible to edit/modify already stored data in adobe analytics (PAGE URL evar ) Stains5E70. Under Actions, click an existing Adobe Analytics - Set Variables action or click the ‘+’ icon. Save changes. All current Adobe Analytics packages can add this model with Attribution IQ. Short answer is that if you're using the Experience Cloud ID service, the cookie should be all you need. Component Settings: Applying customizations to metrics or dimensions, like attribution, behaviour, format, and others:Go to the Rules tab, then click the desired rule (or create a rule). Props are of only 100 bytes, while eVars are of 255 bytes. Persistence: Definition from Google: The continued or prolonged existence of something. Configure the Analytics extension to send data to Adobe Analytics. Tagged as adobe analytics page vies instances and occurrences, compare. eVar will maintain "Page 2" value on this page viewThe do_plugins logic typically lives in the custom code section of the Adobe Analytics extension. A byte is generally a single character, however can take up to 6 bytes depending on the complexity of the character. An aggregated page of time spent dimensions and metrics. Created for: User. Business. These fields are included in the Adobe Analytics ExperienceEvent Template. Analysis Workspace, Reports & Analytics, Report Builder (called ‘total time spent’), Data Warehouse The post_evar16 and post_evar17 columns show shows the persistence of eVars. niranjankpune. Even though the activity is no longer active, it is still following the user via eVar persistence. Click the checkbox to. Visit Page = "Page1" & eVar1 = "Proposed" -then- Page = "Page2" & eVar1 = "Proposed" D. The interesting thing I saw was, we tracking a search page load as an event. Create an Adobe Analytics tag property. Create a blank HTML page on your desktop, include the s_code from your site, and set the s. Adobe Analytics. In the case of props, time spent is counted across subsequent link events as well. trackAction('log_addToWallet_pressed'); } My initial thought was to create a GENERAL trackAction Data Element that I could apply to an eVar and map to its associated Context Data function via Processing Rules, so that ANY 'trackAction' function could be pulled. First Page View - prop and eVar are set to "Page 1" Click action tracked - no prop value, but eVar maintains "Page 1" value with occurrence metric; Second Page View - prop and eVar as set to "Page 2" Third Page View - prop and eVar are not set. User. eVar persistence is defined by the eVar settings in Analytics > Admin. We are setting some custom values through custom conversion variable (eVar) programmatically by taking reference of Using s. s. 2. What are evars and props? What is a hit and how does data show up in a hit? What does this mean in terms of reporting? Part 1: What are evars and props? Once data is collected from the website’s datalayer. When I apply a hit segment for a specific Target activity, why are unrelated experiences returned? Answer. Mark as New; Follow; Mute; Subscribe to RSS Feed. Create a segment with Visit Container where eVar1 exists. 309651682-Analytics-Reference-Adobe. Admin. Adobe Analytics - Foundation. Click Analytics > Admin > Report Suites. Any event is hit based, it does not persist after the hit. E. s. Hi , Regarding your first question, when you change the expiration of the eVar from month to Never then the eVar values which are set with the previous expiration will continue with the previous settings. However, by default eVar persistence till visits and due to this nature of eVar, it has higher count as prop even if sending same values in b. This dimension helps you understand which links were the most successful in driving traffic to your site. I'm quite new to adobe analytics and this is my first question I posted here, so please don't be to harsh with me. account variable to a dev report suite. One advantage that props do have, is the ability to enable them as list props - which can capture multiple dimensional items in a single hit: List Props eVars have the ability. . The following table shows the variables that the Adobe Experience Platform Edge Network automatically maps into Adobe Analytics. s. All subsequent success events that involve this product are credited to "Canary". eVars accumulate time spent on any hit where the eVar is set or persisted. Make sure that you record how you use each list variable and their logic in your solution design document. LearnEach eVar allocation and expiration is linked to a visitor profile, so to the visitor ID that is sent. In the current version of Adobe. Go to the Rules tab, then click the desired rule (or create a rule). Learn why and how to track the full user agent. mid'] = 'D=mid';A page is loaded with multiple products displayed, it creates a 1st server call. campaign variable is treated identically to an eVar. The s. Analytics and Audience Manager both use segments. Analytics sets Adobe Advertising IDs (AMO IDs) within the Analytics hit, subject to the advertiser’s eVar persistence setting, which applies to both click-throughs and view-throughs. It is very common question while setting up new report suite or even in old report suite that what should be the timestamp setting. See How to implement Adobe Analytics using the Adobe Experience Platform Web SDK for more information. Keep these potential extra characters in mind if your implementation regularly sends values that exceed character limits. Name the rule All Pages - DOM Ready. Yes, attribution on your eVars is the issue. Not already a member? Join now to receive details of all out upcoming webinars. The timestamp setting on your report suite, it will change. It is very common question while setting up new report suite or even in old report suite that what should be the timestamp setting. AppMeasurement for JavaScript has historically been a common method to implement Adobe Analytics. The "adobeanalytics" tracking template uses the <amp-analytics> HTML tag to construct a tracking request directly. It is in this eVar persistence that Adobe beats out competitors. So for example, let's say you pop eVar1 on every page view with a page name (and let's say the values are "page1", "page2", etc. There is not a dedicated field in the Adobe Analytics extension to use this variable. If you want to use the same value captured in the data element over another page in the session, you would use the data elements' "Remember this value for the session". The tag sends. Under Actions, click an existing Adobe Analytics - Set Variables action or click the ‘+’ icon. e. eVars using the Adobe Analytics extension You can set eVars either while configuring the Analytics extension (global variables) or under rules. Locate the Props section. Get the most out of Adobe Analytics. Save your settings. . Enter a name for your data element. Unspecified values in an evar report is an expected behavior because of its persistence. Under Actions, click an existing Adobe Analytics - Set Variables action or click the ‘+’ icon. Create a processing rule that sets an Analytics variable to the context data variable value. However, if the current evar value is the sa. s. 10:02AM, Type-in URL of Page A > Page B > Exit. For the Product Finding Method, the best practice for setting a merchandising eVar’s expiration should be setting it equal to. You can use the metric shown in this video in any report to understand the count of one dimension against values of other. Locate the Campaign section. Home ≫ Blog ≫ Adobe Analytics ≫ Cart Persistence and Duration [SiteCatalyst] Originally written by Analytics Demystified on April 23, 2012. If so, then see below. Set the Extension drop-down list to Adobe Analytics, and the Action Type to Set Variables. Leave Tracking set. This incorrect parsing throws off the rest of the product string, causing incorrect data in dimensions and reports. Go to the Rules tab, then click the desired rule (or create a rule). 3. we used a eVar to hold the search keyword. However, for the new values, the new expiration will be applied. Sent With - Indicates when the data is sent: Media Start is the analytics call sent on media start, Ad. Click Events > Add to open the Event Configuration screen. purchaseID variable is a string that contains a unique identifier to a purchase. Admin. Select the desired report suite, then go to Edit Settings > General > Processing Rules. If usePlugins is enabled, it automatically runs just before any type of image request is compiled and sent to Adobe, including. Locate the Events section. Set the Extension drop-down list to Adobe Analytics, and the. Click the 9-square icon in the upper right, then click the colored Analytics logo. eVar, yours truly, Sanmeet Singh Walia, will be writing not 1, not 2, not 5, but 10 blog posts elaborating the various cases with props and eVars. Hi, Unspecified values in an evar report is an expected behavior because of its persistence. The reports, visualizations and underlying technology that power Reports & Analytics no longer meet Adobe’s. SO if we use logged in reference again. 2. An instance is counted each and every time the eVar is populated. pdf), Text File (. Instances metric is useful when you. Conversion Variables (eVars) overview. AA Product String Builder (By SDI) Adobe Analytics Product String (By Blast) Adobe Analytics Product String (By Adobe) We found the AA Product String Builder to be the most comprehensive extension. The Custom Insight Conversion Variable (or eVar) is placed in the Adobe code on selected web pages of your site. useBeacon variable is a boolean that determines if AppMeasurement uses the browser’s navigator. If you do not have access to Attribution IQ, please rely on A4T data in Reports & Analytics. Values passed into eVar variables follow the user for a. linkTrackVars and s. Read real-world use cases of Experience Cloud products written by your peersAnalytics and Audience Manager both use segments. Keep in mind that persistence is based on report time processing, not. You can place links with different query string parameter values in different places across the internet. As such, VISTA rules running on the ASI report suite can change the data,. If a previous value was set and expired it will not show in the reports. for eVar, they mentioned that it is a persistence variable which can be used to hold conversion related info. Experience League Communitydeleting the eVar in your implementation would result in not sending the data to Adobe Analytics. Analytics segments operate on a different set of data than Audience Manager segments. Workspace / Custom Set Home Screen (Adobe Analytics) Adobe Analytics doesn’t presume to create a pre-built report for all users to see on login. This new report suite would most likely be populated using a VISTA Rule. and give you useful channel insights. It collects and streams data into an auto-updating UI, using real-time. Go to the Extensions tab, then click the Configure button under Adobe Analytics. Method #2 - Use Dynamic Variable Syntax. What data collection limitations apply to virtual report suites? Real-time reporting is unavailable, Unique values are limited to 500 thousand per report, Segmenting data feeds is not. 1. products to 'Games;Monopoly: 3rd Edition;1;19,Electronics;Go Pro;2;198'. campaign variable is treated identically to an eVar. Post-processing can include eVar persistence, processing rules, lookups (geo-location, mobile device), VISTA, and many others. When you use a Click event, Launch provides a "this" object that is the DOM element of the clicked element. If I add the new evar to production Report Suite, I can see it in the extension mapping. However, for the new values, the new expiration will be applied. timestamp variable is a string containing the date. Install the plug-in using the Web SDK extension. Adobe Champion 8/26/20 6:01:38 AM. server. There is not a dedicated field in the Adobe Analytics extension to use this variable. Binding events are "prodView" and "scAdd". I've identified that the reason I am not seeing data is that the Evar that I created (called GCLID) is not pulling in any click data from the URLs. User. This feature is limited to the provisioning of up to a maximum of three endpoints per Report Suite (i. The s. . Valid values for this variable can be any string up to 100 bytes in length. Log in to Adobe Experience Platform Data Collection using your AdobeID credentials. eVar persistence settings: eVars are no longer part of Customer Journey Analytics. You can specify hit requests that fire on specific page events, like the page becoming visible or on a click. Targets. pageType variable is a string where the value. . In short that how the data is been sent to report suite , does the image request have time stamp parameter or not. Expand the Link Tracking accordion, which reveals the Track outbound links checkbox. . Read real-world use cases of Experience Cloud products written by your peersHi all, I have a merchandised eVar which captures a search term. iOS SDK repository; Android SDK repository; Documentation; Version 4 Mobile SDKsAnalytics Data Feed should be used: To utilize the most granular data feed we can provide (visitor ID, hit). we used a eVar to hold the search keyword. The Adobe Analytics (AA) library already does the work internally to get the mid value and include it as a url parameter in a given request to the collection server. Below is the document that will explain in detail about unspecified. purchaseID in AppMeasurement and the Analytics extension custom code editor. What represents over 95% of the elements in the Adobe Analytics web beacon? Query string parameters. Analytics sets Adobe Advertising IDs (AMO IDs) within the Analytics hit, subject to the advertiser’s eVar persistence setting, which applies to both click-throughs and view-throughs. Experience Edge forwards the appropriate information to the desired products. On the first data connection containing a previously unrecognized s. This can lead to out-of-order data and negatively impact time calculations (such as time spent values), attribution (eVar persistence), visit number/visit counts, and pathing reports. 8. The numerator in all time spent calculations is total seconds spent. Admin. Once an eVar reaches its expiration, it no longer receives credit for success events. You have way more success events to use than eVar and can do calculation on numeric events. ClearVars is used to clear values that are set on the page (i. Post-processing can include eVar persistence, processing rules, lookups (geo-location, mobile device),. The persistence setting is configured on the Adobe Advertising back end, and your Adobe Account Team can change it. It takes all Analytics variables defined on the page, compiles them into an image request, and sends that data to Adobe data collection servers. Making the change to the eVa. It is set on the same hit as a purchase event. Audience Manager uses key-value pairs to represent signals. Mobile scorecard/Dashboards. In the main panel, select an available eVar and set as the value of the Data Element Page Template. This preprocessing step applies visit expiration logic and eVar persistence logic (among other things) to the data as it is collected. Wanted to check if Adobe analytics provides the capabilities of hiding/unhiding of any variable (evar, prop or events). What data collection limitations apply to virtual report suites? Real-time reporting is unavailable, Unique values are limited to 500 thousand per report, Segmenting data feeds is not. Under Actions, click the to add a new action. Sign In. This plug-in is unnecessary if the New/Repeat visitor dimensions in Analysis. purchaseID in AppMeasurement and the Analytics extension custom code editor. All subsequent success events that involve this product are credited to "Canary". Return to the Report Suite Manager in Adobe Analytics by going to Admin > Report Suites in the main navigation. Each row is one ‘hit’, a single. But in the evar report, for the keyword against visitors, then 99% are unspecified. None, Unspecified, Unknown, and Other in reporting. If both XDM fields are present lineItemId takes. an eVar keeps the value as long as you defined. t()) or a Non-PageView Server Call (s. Save your settings. Locate the eVars section. Please let me know if there is a way to get the. Customer Journey Analytics features compared with Adobe Analytics features set. Traffic data includes visits, visitors, page views. Like. None, Unspecified, Unknown, and Other in reporting If you are using Visits, Uni. js. And I do not mean eVar persistence. Cross-Device Analytics (CDA) is a feature that transforms Analytics from a device-centric view to a person-centric view. This video shows you how to do this. But challenge here is that interested attribute is optional for few scenarios so for those scenarios it takes previously set value which is inappropriate . Defining your internal site search business requirements; Implement internal search variables using AppMeasurement; Implement internal search variables using Web SDK;. Also learn the difference between traffic and conversion variables and how they relate to conversion events. ). But in the evar report, for the keyword against visitors, then 99% are unspecified. Reports & Analytics: Click Analytics > Reports, open an existing report and click the Segments. or never). Persistence: Definition from Google: The continued or prolonged existence of something. See Create a solution design document in the Implement user guide. Advertising Cloud Analytics Audience Manager Campaign Classic v7 & Campaign v8 Campaign. The s. Post-processing can include eVar persistence, processing rules, lookups (geo-location, mobile device), VISTA, and many others. All in all, linkTrackVars have created a lot of confusion, lost data (because people forget to add new variables to linkTrackVars/Events or do it the wrong way), and falsely tracked data (because people often don’t clear linkTrackVars correctly, and then some. Page(Page), Username(eVar) and LoggedInCount (Success event1) and LinkClickCount(Success Event2) I have applied Analytics like this: a) Track how many times person logged in - When a person successfully logged in, Fire a direct call rule with Page (Landing page value) and eVar (logged in person's name), SuccessEvent1 (With. pageName, s. If not, please clarify. We have a unique situation we've been noticing within our Adobe Analytics, we have last touch channels which when we pivot for eVars (which have been set to visit. I am in a need to change user visited urls (pageURL evar dimention value) need to be changed to show correct data in a dashboard, just need to change a url parameter value alone for old data, is it possible? TOPICS. pageType in AppMeasurement and the Analytics extension custom code editor. I am curious what is context for the Custom chains of event? I am curious the business objective. Analytics segments operate on a different set of data than Audience Manager segments. Thanks for the confirmation on eVar persistence. Evar values persist for. Let’s look at an example. adding "eVar41 Instances" will show you the amount of times the eVar appears in the server call. During data collection, Analytics applies many different post-processing steps to the data that are not available to Audience Manager. Click the checkbox to. Click the library’s drop-down list again, and select Approve for Publishing. Full Support; Customer Journey Analytics uses the Experience Data Model (XDM) and supports unlimited metrics and is not tied to the custom success events of Adobe Analytics. The addProductEvar plug-in allows you to easily add an Adobe Analytics merchandising eVar that uses product syntax to the products variable without worrying. Since allocation and expiration determine what values persist, they are vital in getting the most value out of an analytics implementation. Customer Journey Analytics provides the following calculated metrics to cover the most common use-cases: Calculated metric name. Click the link to learn more and apply. Spec. At that time, Reports & Analytics and all of its reports and schedules will stop working. If you like to multiply the evar value by the number of instances, then set the rate and hinge to instance. Persistence and Expiry of s. Or maybe on the flight every time business user chooses this evar? Any idea? ThanksThen you shall see same or very similar number compare to Prop. Click Events > Add to open the Event Configuration screen. SOLVED Retroactively importing data into an eVar after it has been set. Go to the Rules tab, then click the desired rule (or create a rule). Hence, you would not see it in the debugger. Adobe recently changed how it processes data in Customer Journey Analytics: Any event data with a timestamp less than 24 hours old is streamed in. eVars persist, whereas s. Once data is collected from the website’s datalayer(by a Tag management solution) this data is stored in an Adobe analytics variable for reporting. The value "Aviary" for eVar1 is assigned to the product "Canary". pageType variable is a string where the value. Page Type using the Adobe Analytics extension. Log in to Adobe. If you are interested to see how this works, you can pull out a data feed, and study the behavior of any visitor through the following columns eVarXX and post_eVarXX.