One of such activities as sale, tourism, finance, medical care, etc., not related to production.

The act of treating someone with kindness and care so that he/she feels pleased.

The act of a seller giving something to a buyer cheap or free of charge in order to please him/her.

The act of the attacking side serving or throwing a ball into the opponent's side in a sports game such as table tennis, volleyball, tennis, etc.; the served ball.