Teams is all about open communication, but sometimes you just want to make a statement and not have a conversation. You can do this by restricting replies to a topic, in which case only the original author and channel moderators can reply. And if moderation isn’t used for a channel, team owners take that role.
Teams has added the ability for moderation of channel conversations. If you moderate a channel, only team owners can post new conversations and you can restrict things even further by stopping members, bots, and connectors posting. It’s a feature that helps to control communication in channels intended to publish and share information.