What does it mean to 'steal' a base in baseball?

What does it mean to 'steal' a base in baseball?

Alan Jaeger (Pitching Coach / Founder) gives expert video advice on: What does it mean to 'take a lead' off of a base?; What does it mean to 'steal' a base in baseball?; How far should I 'lead off' of a base in a baseball game? and more...

What it means to steal a base in baseball is when you take your leadoff off the base and as soon as you see the pitcher make an attempt to go to home plate, then you are free to run to the next base. If you can get to the next base safely before the catcher throws the ball to that base, then you have considered yourself stolen a base.