A Texture Atlas is a large image that contains multiple smaller textures, often used in computer graphics and game development. By combining various textures into a single image, developers can reduce the number of texture files that need to be loaded, which improves performance and efficiency in rendering. Using a texture atlas helps minimize the number of draw calls made to the graphics processing unit (GPU), as it allows multiple textures to be accessed in a single operation. This technique is commonly employed in 2D games and applications, where it can enhance visual quality while optimizing resource management.