Rotations, or spins, refer to the circular movement of an object around a central point or axis. In physics, this concept is crucial for understanding how objects behave in motion. For example, the Earth rotates on its axis, causing day and night, while planets in our solar system also spin as they orbit the Sun. In mathematics, rotations can be described using angles, typically measured in degrees or radians. A rotation can be clockwise or counterclockwise, and it can be represented using matrices in geometry. Understanding rotations helps in various fields, including engineering, animation, and robotics.