The BuddyPress activity loop shows every kind of BuddyPress activity by default. However, the activity loop wasn’t meant to be a one-size-fits-all arrangement. In fact, the BuddyPress core developers have made it possible for you to filter the loop using a number of specified parameters.
You might be surprised by how many ways there are to customize the activity loop. Here’s a quick list of what’s possible, as outlined in the BuddyPress codex:
Filter activities based on scope – Show only activity for the scope you pass, ie. just-me, friends, groups, favorites, mentions