What is 3D Animation Compared to 2D Animation

We can all differentiate between viewing a 2D animated film, (for example, Aladdin or the Little Mermaid) and a 3D animated motion picture, (for example, Toy Story or Minions). The majority of us realize that 3D animation is done on a PC, however what is 3D animation REALLY?

What is making a 2D animation instead of making a 3D one? all things considered, really the making procedure is altogether different.