What is bjj?
Brazilian Jiu Jitsu (BJJ) is a martial art and combat sport that focuses on grappling and ground fighting and was formed from Kodakan judo ground fighting (newaza) fundamentals.
BJJ eventually came to be its own combat sport through the experiments, practices, and adaptation of judo and jujutsu through Carlos and Helio Gracie (who passed their knowledge on to their extended family) as well as other instructors who were students of Mitsuyo Maeda.
The greatest thing about BJJ is its focus on technique as opposed to size or physical strength, which allows people of all shapes and sizes to practice the sport.