Collision detection is a computational technique used in various fields, including computer graphics, robotics, and video games. It determines whether two or more objects in a virtual environment intersect or come into contact with each other. This process is essential for creating realistic interactions, such as characters walking on surfaces or vehicles avoiding obstacles. There are several methods for collision detection, ranging from simple bounding box checks to more complex algorithms like Ray Casting and Spatial Partitioning. These techniques help optimize performance by reducing the number of calculations needed, ensuring that systems can handle multiple objects efficiently without lag or errors.