Swimming involves moving through water using the arms and legs. There are several competitive swimming strokes including freestyle, backstroke, breaststroke, butterfly, and individual medley. Mastering basic swimming skills like breathing, gliding, coordination, and diving are important before learning strokes. The breaststroke involves pulling arms in and a frog kick while the butterfly requires precise timing of arm and leg movements together. Freestyle uses alternating arms with a flutter kick. Proper techniques for backstroke, breaststroke, butterfly, and freestyle are described.