The gluteus maximus is the largest muscle in the human body, located in the buttocks. It plays a crucial role in various movements, including walking, running, and climbing stairs. This muscle helps to stabilize the pelvis and supports the trunk during activities. In addition to its functional importance, the gluteus maximus contributes to the shape and appearance of the buttocks. Strengthening this muscle can improve athletic performance and enhance overall body strength. Exercises like squats and lunges are effective for targeting the gluteus maximus and promoting muscle growth.