Twitch is a platform dedicated especially and only for gamers, from streaming and watching live gameplays to messaging - it has all of that in one place. It has got two major updates in a row since December last year, bringing a nice new feature and a plethora of under-the-hood optimizations regarding stability and performance. Below are the official release notes from Google Play available for each version.
Introducing Tags, a new way to discover streamers on Twitch!
Use Tags to filter the Browse tab and find new streams. Use Tags to find game genres, or specific stream types, like a "Casual Playthrough."
You'll also see Tags alongside each category or stream anywhere thumbnails appear in the app.
Bug fixes, stability fixes, and app optimizations
The 7.2.0 beta, which actually got released last month, added a new Tags feature, bringing a much easier and convenient way of discovering streams and streamers on Twitch. You can use Tags to find streams for specific genres like FPS, MMORPG and a lot more in the Browse tab. Meanwhile, games and streamers also have tags displayed alongside their thumbnails and names/titles, which makes it easier to find out to which genre they belong to.
The most recent update is actually v7.3.0 (non-beta) and is going to hit the Play Store soon, but it can be sideloaded by downloading from APK Mirror as well.
Source: Google Play