"Wait on" and "wait for" are both commonly used phrases, but they have slightly different meanings:

"Wait on" typically means to serve or attend to someone, such as a waiter waiting on customers in a restaurant.

"Wait for" means to remain in a place or stay in a state of expectation for something or someone to arrive or happen, such as waiting for a friend to arrive at a meeting spot.

In general, "wait on" is more focused on serving or attending to someone, while "wait for" is more focused on expecting or anticipating something.