The most familiar form of 2D animations can be found by watching Saturday morning cartoons with your kids, or even simpler animations every day when you surf the web. It takes on the forms of advertisements, e-cards, etc. The basic starting point for all animations is a storyboard that lays out the basic script in a visual format, much like an extra large comic strip.
From that point, a rough audio track of the script is created to give animators something to sync with their drawings. This form of animation uses "vector graphics," meaning that the images are based upon mathematical equations, rather than by an array of pixels, such as in "raster graphics".
Although similar in some ways to 2D animations, 3D computer animation is a different process, as a scene being done in 3D is created long before any actual animation begins. Even in general terms, most people automatically think 3D when they are speaking or reading about computer animation, partly due to its flexibility.
What many people do not realize is that the entertainment industry and specifically motion picture applications, while possibly being the forerunners in advancing technologies, only account for a fraction of the 3D animations market. Actually, there is very little difference between computer animation and what is called traditional animation.
The main difference is the tools that are used to create animations, the effort, and the price. Traditional 3D animation was more like claymations and was done by using stop-motion filming technique. Essentially, the true concept of 3D animations did not really catch on until the use of computers for animation became more cost-effective and practical.