If you don’t know about Host Mode, it allows you to feature other broadcasters on your page so your viewers still have something to watch on your channel even when you aren’t live. Primarily, it’s used to promote content you enjoy, help support other streamers and remain connected with your community as you watch content, like game conferences and e-sports tournaments, together.
For mobile users, the option has been sadly absent since the feature was introduced. It’s now available to all iOS users with a slower roll-out for Android users. Simply update the Twitch app and you’re ready to host.