Despite YouTube and Facebook's best efforts, Twitch is still the king of video game live streaming. The platform's popularity has given rise to a new problem though: discoverability. When so many different people are streaming, how do you find the channels that suit your particular interests? Enter "Communities," a new type of hub page that users can build around specific games or topics. They can be about almost anything -- speedrunning, comedy, or the joys of Jet Grind Radio. Each community is public and listed in a new Community directory. Streamers can then "target" them so their broadcast appears on the page's "stream wall."