Since Dynamic Collections are search-based, front-end users are able to “follow” them in order to receive email updates over time. This is a great way to keep users informed of a topic that is developing over time.
In order to see what a particular user is following, you can go to their user account in the admin and click on the "Saved search" tab. From here, a BLOX admin can remove a search that the user is following, if requested.


