What does "RSVP" mean?

“RSVP” is an abbreviation for the French phrase “Répondez s’il vous plaît,” which translates to “Please respond” in English. It is commonly used on invitations to request that the invited guest responds to indicate whether or not they plan to attend the event. By responding to an RSVP request, the host can get an accurate headcount of guests and make necessary arrangements for food, seating, and other accommodations. The response can be in the form of a written reply, an email, or a phone call, depending on the instructions provided by the host. It is considered good etiquette to respond to an RSVP request promptly, whether accepting or declining the invitation.