Side control is a dominant position in Brazilian Jiu-Jitsu and mixed martial arts where one practitioner lies perpendicular to their opponent, controlling their upper body. The person in side control typically has their weight distributed on the opponent's torso, making it difficult for them to escape or regain a more favorable position. In side control, the practitioner can apply various techniques, including submissions and transitions to other positions. Maintaining side control requires good balance and pressure, as the goal is to limit the opponent's movement while setting up attacks or advancing to a more dominant position like mount.