In a gym, benches are versatile pieces of equipment used for a variety of exercises. They come in different types, such as flat, incline, decline, and adjustable benches. Flat benches provide a stable surface for exercises like bench presses and dumbbell workouts. Incline and decline benches are used to target different muscle angles, particularly in the chest and shoulders. Adjustable benches offer the flexibility to switch between flat, incline, and decline positions. Specialized benches like the preacher curl bench help isolate specific muscles, such as the biceps, while abdominal benches are designed for core workouts. Overall, benches are essential for strength training and provide support for a wide range of exercises.