Moderators can pin a recurring meeting topic, or make a pinned topic recurring. A pinned recurring topic can save you time if you have specific topics that are always discussed at the beginning or end of your meeting.
For example, you might make customer issues a pinned and recurring topic if you run a status meeting every week. That way you only need to add the topic once to your meeting and the topic is automatically pinned to the top of your agenda.
For information about how to pin a meeting topic, see Can I force a topic to the top or bottom of an agenda in a Collaborative meeting?