Skier's turn is a skiing technique used to change direction while skiing. It involves the skier leaning into the turn and using their edges to carve the turn. The three most common types of skier's turns are ESS (Edge-Set-Slide), STEM (STEM Christie), and Telemark. ESS involves the skier setting their edges into the snow and sliding across the hill, while STEM involves the skier making a half-turn and then pushing off with their outside ski. Finally, Telemark involves the skier making a full turn and then pushing off with their outside ski.