When you start animating, a common acronym is 'FPS.' FPS stands for 'Frames per Second' and it determins how many frames fit in a second. 60 FPS is considered good and smooth, however, part of the smoothness comes from how smooth you animate. Animating a character with a lot of frames makes it even smoother with 60 FPS. A fantastic amount of FPS is 120 frames. It will take longer to animate, however will look super smooth.