How Sampling Works in VWO?

Sampling refers to a random sample of visitors which represents a larger set of your website visitors. Sampling your website visitors helps derive meaningful insights without being overwhelmed with too much data.

VWO Insights quota is typically the visitor quota for research purposes. According to your website traffic, VWO calculates a sample size and distributes your Insights visitor quota to last through the month. For example, your website has a traffic of 1 million unique visitors per month and you have opted for an Insights quota(Sampled Visitor Quota) of 500,000 as of the sampling size. This means you can track 500,000 unique visitors per month on your website for tracking and analyzing goals, funnels, heatmaps, session recordings, and form analysis.

ATTENTION: Sampling does not apply to VWO Testing (A/B, Split URL, 
Multivariate, FullStack), Personalization, Surveys, and Website Review.

VWO uses cookies to track visitors who are part of the sample and who are excluded from the sample. As per the Insights quota(Sampled Visitor Quota) included in your plan, VWO randomly includes visitors for Insights and the quota is dynamically sampled to lasts through the monthly billing cycle.

For visitors who are part of Insights sampling, VWO tracks each visit for a sampled visitor, and visitor behavior is presented in all features such as heatmaps, session recordings, form analytics, goals, and funnels. This allows you to get deep insights into your visitor behavior and a better understanding of your website performance.

Reading Quota Utilization in VWO Insights

You can view your insights quota and its limits in the USAGE section of your VWO account. All you need to do is, go to SETTINGS > ACCOUNTS > USAGE.

In the VWO Insights section, you can get the information on: 

• Sampled Visitors: it shows the count of sampled visitors quota you have consumed and how much is remaining.
• Data Retention: shows the period for which the sampled session will be stored in VWO servers. 
  

  NOTE: All your Insights data (including Goals, Funnels, Heatmaps, 
  Recordings, and Forms) is retained on a rolling window basis as 
  per your data retention policy.Based on the volume of visitors purchased, 
  VWO will sample visitor data uniformly from the traffic coming to 
  your website (or part of website/pages where VWO SmartCode code is 
  present) to ensure you get a representative set across a month.

• Limits of Each VWO Insights Feature(Funnels, Recordings, Surveys, Forms, Survey Responses): these limits represent how much quota you have consumed, and what is left. In other words, all of these keep you updated on how close you're to reaching the limits of the different features of VWO Insights.