Once upon a time if you pressed F1 on the desktop a full manual showed up that started with "how to use a mouse" and ended with registry hacks. It was contextual so if you were in the calculator it showed information about the calculator.

Today if you press F1 it opens Microsoft™ Edge™ with a Microsoft™ Bing™ search for how to get help with windows. The results include some shitty youtube videos that somebody uploaded with that exact phrase.