There's two forms of Jiujitsu: Sport (mainly gi), and No-gi mma. The no gi mma is more practical on positioning yourself in dominant positions for attacks, or defense to where you arn't trying to get ground and pounded. Plus more realistic that there arn't thick jackets when you really fight.
Sport with Gi is a lot of holds, and throws (sort of like olympic judo) Its slower, and more technical if more nasty chokes, when you have a collar to hang someone with.
Jiujitsu in general is not much striking, its more controlling your opponent in grappling, maintaining dominant positions and setting up joint locks, and chokes submissions. Most people in the gym also train boxing/ kick boxing, and mash up there skills - very close range style.