Tell me how things work, but wrong, but in a somewhat plausible way, i’ll start
API stands for “Another Parcel Incoming”, and is a way for a computer to sort through electronic mail or “email” it gets. Essentially, when to computers want to talk, they’ll send each other letters with a “package” attached. Depending on the labels on the letter, it will get sorted through various “chutes” to the correct “box.” Then a “worker” will open the package, read the letter telling it what to do with the contents, then do it.
After it is done, it will send another email back with a package that says what it did, and whether or not it was successful. This can all happen in less than an hour - the magic of computers!