Why is the serve so important in Tennis?

The serve is the opening shot. Often the player making the serve will try to make the tennis ballgo as low over the net as possible to force their opponent to move up, or potentially miss returning the ball altogether for a quick and easy point. Additionally, it gives the serving player control over the space, rhythm, and positioning of the early game. It can force an opponent out of their comfort zone, or reduce the chance of an aggressive return as the opponents expend their energy to position themselves properly.