Twitter has begun the process of rolling out a new bottom navigation bar to everyone. The update to the Twitter for Android app is a cloud-side update meaning that so long as you have the latest version of the app, you should get the new navigation bar in the social app. For those that are curious, the latest version is 7.53.0.
There isn’t a lot of mystery here – you get a bottom navigation bar when this update is pushed to your account. You have the Home (feed), search, notifications, and direct messages all a single tap away with the tab you are on highlighted in blue.