The purpose of "Click expiration" option is to filter out irrelevant conversions from your tracking report.
It's useful in case when you work with a CPA model for a certain period of time (e.x. a discount period).
How to enable the option
1. Open the network settings (Offer sources -> choose the target affiliate network)
2. Scroll the page until the "Click expiration" field
3. Switch the toggle on and specify an expiration time
4. Save the changes
Once you set it up, conversions with expired click ID data will be ignored by our system and they will not be added to your tracking report.