This tool allows you to show a random clip from the channel you shout out. This may attract your viewers to go check the streamer out. It is also possible to enable a shoutout channel reward which allows viewers to shoutout a channel to their choice.
BackViewers enter the channel name which they want to shoutout.
Create a custom channel reward for your channel.
Enable "Require Viewer to Enter Text", this will make sure the reward redemption is visible.
Manage your channel rewards here.