Talk to a sales representative

+1 844-822-8378

Write to us

Cookies stored by VWO

Wednesday, February 26, 2014

VWO uses cookies to run campaigns and to track user information. The cookies keep track of the variation a user has viewed, and helps to serve the same variation to the user consistently, track goals completed by a user, and determine whether a user is part of a campaign.

VWO uses the following cookies to track users and campaign information:

  • _vis_opt_exp_EXPERIMENT_ID_goal_GOAL_ID: This cookie is generated when a goal is made.
  • _vis_opt_test_cookie: This is a session (temporary) cookie generated to detect if the cookies are enabled on the browser of the user or not.
  • _vis_opt_exp_EXPERIMENT_ID_combi: This cookie is generated when users reach a particular combination. This makes sure that users see the same variation that they earlier saw when they visited the page.
  • _vis_opt_exp_EXPERIMENT_ID_exclude: This cookie is generated when a user has been excluded from a campaign.
  • _vis_opt_exp_EXPERIMENT_ID_split: This cookie is generated during a Split URL test.
  • _vis_opt_s: This cookie detects if the user is new or returning to a particular campaign.
  • _vis_opt_out: This cookie indicates that the visitor is not part of the campaign. It is valid for 10 years.
  • EXPERIMENT ID refers to the ID of the campaign and the GOAL ID refers to the ID of the goal.
  • _vwo_uuid: This cookie generates a unique id for every visitor and is used for the report segmentation feature in VWO, and it also allows you to view data in a more refined manner. If you have the campaign running on multiple domains, you will notice campaign specific UUID values.

In the _vis_opt_exp_EXPERIMENT_ID_combi cookie, the Control always has the value of 1, Variation #1 always has the value of 2, Variation #2 has the value of 3, and so on.

Note: All the cookies except the _vis_opt_test_cookie and _vis_opt_out expire in 100 days.

Check Your Email!
We've sent a message to
with an activation link in it.
Just click the link, and we'll take it from there.
Can't find the mail?
Check your spam, junk or secondary inboxes.
Still can't find it? Let us know at