These are meetings where officers meet to discuss club business and related matters on a regular, recorded basis.
What you discuss will probably vary from meeting to meeting. Topics could range from who's coaching the team, to who's washing the kit.
Your constitution should tell you the minimum number of committee members needed to make decisions (quorum).
How often are they held?
Your constitution should say how often you'll meet. Every 3-4 months is recommended.
However you may need to meet more often, to start with.
What are the roles?
The club secretary is usually responsible for the meeting time and venue and for giving notice to committee members.
You should appoint someone to take minutes to make sure all key discussion points and decisions are captured and recorded.
The minutes should be reviewed and approved by committee members. If possible, they should also be circulated to the wider club too.