> For the complete documentation index, see [llms.txt](https://docs.fullsession.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fullsession.io/19.-integrations/fullsession-with-optimizely.md).
# FullSession with Optimizely
This guide outlines the steps for integrating FullSession with Optimizely. Through this integration, each recorded session can be associated with experiment and variation information, enabling FullSession customers to compare user behavior across different segments based on experiment or variation IDs and names. By consolidating these insights into a single solution, FullSession reduces the need to switch between tools and helps businesses better understand the impact of experiments on customer behavior. By the end of this tutorial, users will be able to integrate FullSession with Optimizely.
### Prerequisites:
* An Optimizely account
* A FullSession account
* Admin access to both FullSession and Optimizely
### Optimizely:
Establish the core elements of Web Experimentation by specifying pages, tags, and events, determining traffic allocation, guiding experiments from draft to launch to archive, and activating the winning variations. [Learn More](https://support.optimizely.com/hc/en-us/sections/39026458919181-Experiment-configuration)
### FullSession:
1. Log in to your FullSession account and navigate to "Settings” in the left bar.
2. From the submenu, select "Integrations".
3. Locate Optimizely in the list of available integrations and click "Install".
4. Select the domain (site) that you want to integrate Optimizely with and then press “Connect with Optimizely”.
5\. Now, FullSession starts collecting the IDs/names of the different experimentations/variations from the recorded sessions and injecting them as custom attributes within the sessions. This allows FullSession users to start using optimizely filters to observe the different variations and create respective segments accordingly.
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