# One visitor One experiment option

Suppose you are running several experiments at once on your site or application. In that case, a visitor will see each of them as soon as they enter the targeting, which may influence the results, since one experiment can impact the results of another.

To avoid this, we offer an option that allows you to display only one experiment per visitor, even if multiple experiments are running.

Learn more about this option (activation and prioritization rules) in our dedicated articles:

:point\_right: [1 visitor 1 test for Web experimentation](/account/technical-implementation/one-visitor-one-experiment-option/one-visitor-one-test-on-web-experimentation.md)

:point\_right: [1 visitor 1 test for FE\&R](/account/technical-implementation/one-visitor-one-experiment-option/one-visitor-one-test-on-fe-and-r.md)

{% hint style="warning" %}

* If you activate it while you have active experiments, it might create biases in your campaign results. We advise you to end all pending tests before enabling the option and launching new ones.
* Activating this option while conducting two experiments (one on your home page and another on the cart page) impacts traffic distribution. Visitors who view the home page before the cart will only experience the home page experiment, reducing traffic allocation for the cart experiment. Consequently, gathering adequate statistics for experiments on deeper pages (like product pages or conversion funnels) will take longer.
  {% endhint %}


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