Animation means technique of photographing successive drawings or positions of models to create an illusion of movement when the movie is shown as a sequence.An animatic means animated storyboard.Boards are brought together and with proper timings basic sound,effects and dialogue recording are included. Animatic is used pre visualising film before production starts. Animation is extremely important for making an animated movie .Through this you will get a sense of rhythm,pacing and progression of your film.You should use adobe after effects is most common software for creating animation. After Effects is great for:
Manipulate the drawings with the puppet tool.
Add elements to the view screen.
Export in various codecs and formats.
Today it is so convenient than ever to get into animation. There are plenty of software available, some of them are quite inexpensive, and most modern computer can handle the simpler animation tasks (mostly 2D).The catch is that although anyone can start animating right now, the art of animation is not easy to learn and very hard to master.