Final answer:
A gavel is typically tapped once to call a meeting to order, symbolizing the commencement of formal proceedings.
Step-by-step explanation:
A judge's gavel is traditionally tapped to signal the beginning or order of various formal proceedings. While the specific number of times a gavel is tapped can vary by the organization or the discretion of the individual wielding it, in many instances, the gavel is tapped once to call a meeting to order. The gavel serves as a symbolic instrument that commands attention, upholds the decorum of the institution, and marks the start of official business.