Here are some tips from Robert's Rules of Order on How to Use the Gavel in Your Club Meeting:
One Gavel Tap
- used to inform members to be seated
- used to announce the results of a vote or outcome of decision
- used to adjourn the meeting
Two Gavel Taps
- the presiding officer taps the gavel twice to call the meeting to order
Three Gavel Taps
- the use / purpose is typically assigned within the organization.
- in most instances, it is used to instruct members to stand up.