Most people nowadays have been exposed to Jiu Jitsu. They know that Jiu Jitsu is type of martial arts. But beyond that they do not know much else. Let me educate you moreso.
In America, Jiu Jitsu has morphed into two basic types. One type is used for tournaments, I refer to it as Sports Jiu Jitsu. They use points to determine a winner based upon certain moves accomplished.
The other type is called Street Jiu Jitsu. It is more applicable to self-defense. The goal is not for points but for what is practical in a fight. This type can be further broke down into the type used in Professional Fights with rules and the street with no rules.