Most of the rules of the game are already cut-and-dried for advanced players, officials and fans. This can sometimes make the introduction difficult for the novice fan.
There is so much interesting to tell about baseball and softball, where do you start with your explanation? While newbies love to learn from people who have already mastered it.
To help with this, there is a rule book for beginners. A nice starting point for all spectators, future players and officials. Even if you think you know everything already, it can of course be interesting. You never know, you might learn something new!