I WONDER - In Baseball What Is A Strike?

The video tutorial explains the roles of pitching and batting teams in a baseball game. It describes how these roles change throughout the game. The tutorial also covers the concepts of a 'no hitter' and 'strike', explaining that a batter is allowed two strikes, and on the third strike, the batter is out of the game.

How many strikes is a batter allowed before they are out of the game?

Describe what happens on the third strike in a baseball game.