I just now learned what Key Frames are thanks @rambai!
So the way I'm understanding this, is that the Key Frame is like the "key" image that opens the door in our mind to the bigger picture or punchline or aha moment. It's a way for the animator to direct viewer mind-traffic and make sure everyone goes through the correct doors as scripted.
Pretty much, all advertising and mainstream programming are just a long series of Key Frames! 💛
scary..
haha..some sort like that..but the terms keyframes mostly were used in an animation productions..to hold the important pose in a scene..