Large YouTube channels not only post content and get a lot of views, but they tend to develop a community. These fans are able to help out, not just by sharing the video, but engaging both the creators and other fans in a meaningful way. This is great for many creators as better fans can benefit them as well. However, it has not always been clear how to do that. The Vlogbrothers, Hank and John Green, have Nerdfighteria. This site is a general landing page for all of their activity and sports a message board.
However, this may be a lot of work for other channels. Do they want to take on the additional work of hosting a website and message board? Perhaps not, but they may still want a way to stay engaged with their fans even without a video. YouTube has a new tab for YouTube channels called the “Community” tab. It has just started rolling out to some channels.
The implementation is fairly straightforward. The channel owner is able to post discussion topics in posts, similar to Google+. These posts can have upvotes and downvotes, and users can respond through comments. These posts can contain not just text, but also images, gifs, and even live video.