Using hold keyframes

I sometimes see beginners have this problem, so I thought it would be worth…going through an example and then introducing you to the hold keyframe.…Let's say I make a motion path like this and then I go later in time and I add a keyframe.…When I add this keyframe by clicking on the diamond,…it will use the same value as the previous keyframe.…So now I've two automatic Bezier keyframes right on top of each other. Now, I'll…go later in time and drag this keyframe over.…When I RAM-preview, you can see it holds on the value between the second…and third keyframe.…

So you don't really need to make a hold keyframe in this instance.…Now I get the result that I'm looking for because I had two automatic keyframes…on top of each other.…Now After Effects knows that when two automatic keyframes have the same value,…it will retract, or remove, the outgoing handle from the first one, and also…remove the incoming handle from the second one, so the handles don't get in…the way of each other.…But look what happens if I don't have automatic keyframes.…