Why are sessions from my paid ad campaigns not being marked as paid traffic?

Propel Replays follows the UTM parameter specifications. According to those specifications:

utm_medium parameter should be added to URLs to specify traffic type (paid, organic, etc.)

In order for Propel Replays to flag traffic as paid, it expects to see a utm_medium parameter in the URL with the value of paid.

For example, if the link to your product page was:

When you ad this link to your ad campaign, you should set it as:

For more information on UTM parameters, check out this great guide on SEMRush: https://www.semrush.com/blog/utm-tracking-codes-google-analytics/