In game development using PixiJS, you often need to manage multiple sprites or graphics elements that should move, scale, or rotate together. This is where containers become essential. A container is a special object that can hold other display objects, such as sprites, graphics, or even other containers. By grouping related elements inside a container, you can apply transformations—like movement, scaling, or rotation—to the entire group at once, rather than adjusting each element individually. This makes managing complex scenes much easier and more efficient, especially as your game grows in complexity. Containers also help organize your code by logically grouping elements that belong together, such as all the sprites that make up a player character or a collection of obstacles.