Brazilian jiu-jitsu is a martial art, combat sport, and a self defense system that focuses on ground fighting. Its origins stem from the ground work in judo. Master Mitsuyo Maeda taught judo to a select few in Brazil, one of these people being Carlos Gracie, who then passed his knowledge to brother Hélio, who gradually developed a softer, pragmatic adaptation from judo known as Brazilian jiu-jitsu (BJJ).
A common misconception we hear people say is that they are interested in training BJJ but they want to get in shape first. By training BJJ you will get in shape, become more flexible, stronger, and more in-tune with your body and your mind, more so than whatever else it was you were originally going to do to get in shape. The training involved teaches you to persevere and overcome adversity every time you practice. It teaches you about self control, and relaxation in tense situations.
BJJ is a great outlet to meet people, make friends, and build relationships. It brings people from all different walks of life together where you could have a high school kid, a doctor, a businessman and a family man all training together. You can have people from all across the spectrum who would never cross paths any other way, and you see this in BJJ more than other martial arts because of the connection you make with people, sharing techniques and friendships.