•key frames they help by showing you what you need to start off with, how the animation ends and important frames in the middle. it should be focused on major frames like beginning, end, some movement in between •in between frames these frames go in between key frames and smoothen out an animation from key frame to key frame (you can be a little sloppy and fast with these by using smear frames/smears which i’ll explain next) the more key frames, as long as they are drawn well and placed correctly, will make an animation smoother and slower depending on how you do it •smear frames smear frames are good for fast paced movement to convey speed and can also, when done right, they can make an animation smoother (similar to squash and stretch) •12 principles of animation definitely check them out cause they will help you!! you have to know them ti improve your animations hope i explained this well!