Activity Feed

The Activity Feed displays the latest posts of the accounts the user is following. 

While not necessarily a community, the Activity Feed in most Miiverse clones can be used to make posts (despite the fact that Miiverse itself removed the ability to do so following its redesign in 2015). Posts made in the Activity Feed are not seen on any public community, and thus can only be found through the Activity Feed itself or through a user's profile. The Activity Feed is typically used to make private or personal posts such as vents.

Although NSFW imagery is not allowed to be posted on almost all Miiverse clones, some clones permit users to post NSFW if it is on the Activity Feed and marked with spoilers.