2D animations are images that move in two dimensions, typically created using software or hand-drawn techniques. They are flat, meaning they have height and width but no depth, making them different from 3D animations. Commonly seen in cartoons, video games, and advertisements, 2D animations can be simple or complex, depending on the style and technique used. The process of creating 2D animations involves designing characters and backgrounds, then sequencing them to create the illusion of movement. Techniques like frame-by-frame animation and motion graphics are often employed to bring these images to life, making them engaging and visually appealing.