Lifting belts matter because they change how a lifter organizes pressure and tension around the torso during heavy movements. A belt does not lift the weight for the user; it gives the abdomen and trunk a firm surface to brace against during squats, deadlifts, presses, and other loaded patterns.
That makes the belt a context tool, not a universal safety device. It can help some lifters create a more consistent brace under heavier loads, but it cannot replace technique, appropriate programming, or qualified coaching. The real explanation sits in breathing, pressure, belt placement, and movement demand.