Compression is the process of reducing the size of data or objects, making them easier to store or transmit. For example, when you take a photo with your camera, the image file can be quite large. By using compression techniques, the file size can be decreased without losing much quality, allowing you to save more pictures on your device. In everyday life, compression can also be seen in sponge materials. When you press a sponge, it squishes down, taking up less space. Once you release it, the sponge returns to its original shape, demonstrating how compression can change the size of an object temporarily.