# impact.com Cookies Explained Cookies are small text files stored by your web browser, typically used to understand how visitors interact with your site, and can remember things like login details or site preferences. Cookies are always tied to specific domains, such as your website (considered a “first-party cookie”), or to another website (like impact.com's tracking server, a “third-party” cookie). Certain cookies may be blocked by default in more recent browsers. [Learn more about how impact.com is ensuring your Program is ITP compliant](https://impact.com/partnerships/browser-news-what-is-itp-2-3-and-google-chromes-latest-on-tracking/). impact.com uses cookies to link multiple events together and track the overall journey of a visitor for accurate attribution and reporting. #### Cookie types {% tabs %} {% tab title="brwsr" %} | | | | --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **Description** | This cookie stores a unique UUID key to help identify a customer later. When a customer clicks on one of your ads from a Partner's site, they're typically directed to impact.com's tracking server, which places this cookie to initially identify them. The next time they click on one of your ads, impact.com can more easily identify this customer for attribution and reporting. | | **Life span** | 720 days | | **Source** | Tracking server | | **Size** | Approximately 40 characters | | **Cookie type** | Third-party | | {% endtab %} | | {% tab title="IR\_PI" %} | | | | --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **Description** | This cookie stores a unique UUID key and timestamp to help identify a customer later. When a customer clicks on one of your ads from a Partner's site, impact.com's UTT JavaScript places this cookie to initially identify them. These are **first-party cookies** set on your domain. | | **Life span** | 720 days | | **Source** | Universal Tracking Tag (JavaScript) | | **Size** | Approximately 40 characters | | **Cookie type** | First-party | | {% endtab %} | | {% tab title="IRLD" %} | | | | --------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | **Description** | This cookie identifies the "last click" and is used to eliminate duplicate clicks during checkout and the final conversion. It stores the Partner's impact.com ID and timestamps to compare against recent clicks. | | **Life span** | 180 days | | **Source** | Tracking server | | **Size** | Up to a 1000 characters | | **Cookie type** | Third-party | | {% endtab %} | | {% tab title="IR\_GBD" %} | | | | --------------- | --------------------------------------------------------------------------------------------------------- | | **Description** | The base domain cookie set on your site. It's part of the UTT JavaScript function that tracks web events. | | **Life span** | Expires when the session ends | | **Source** | Universal Tracking Tag (JavaScript) | | **Size** | Approximately 20 characters | | **Cookie type** | First-party | | {% endtab %} | | {% tab title="IR\_{Campaign\_ID}" %} | | | | --------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **Description** | A current session cookie that updates with activity each time the page loads. It's part of the UTT JavaScript function—specifically in API implementation—for tracking web events. The `{Campaign_ID}` part is replaced with your actual Program/Campaign ID value. | | **Life span** | Expires when the session ends | | **Source** | Universal Tracking Tag (JavaScript) — API implementations | | **Size** | Approximately 150 characters | | **Cookie type** | First-party | | {% endtab %} | | {% tab title="EPERSIST" %} | | | | --------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- | | **Description** | A session cookie generated by impact.com's load balancer. impact.com uses Amazon EC2—this cookie may vary depending on the type of data center. | | **Life span** | Expires when the session ends | | **Source** | Load balancer | | **Size** | Approximately 81 characters | | **Cookie type** | Third-party | | {% endtab %} | | | {% endtabs %} | | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.impact.com/brand/what-would-you-like-to-learn-about/platform-features/tracking/tracking-explained/impactcom-cookies-explained.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.