RSVP stands for "Répondez s'il vous plaît" which is French for "Please respond".
This phrase is commonly used as a polite request for confirmation of attendance at an event, such as a wedding, party, or conference.
When you see RSVP on an invitation, it means the host would appreciate a response letting them know if you will be attending or not.
This helps them plan accordingly and ensure there are enough resources for everyone.