In freediving, finding the right amount of weight is crucial for safety and performance. Freedivers perform three weight checks: the surface safety weight check, the 5m safety weight check, and the 10m performance weight check. The surface and 5m checks ensure that a diver can safely float back to the surface if they experience a blackout. The 10m check focuses on performance, allowing divers to find a neutral buoyancy point, making their dives more efficient. These skills are taught in courses to help divers adapt to different conditions safely and effectively.