I don't claim to know how it works, but if I can't remember the words of a song, rather than cut & paste it from somewhere, I print it and then type it in to my songbook. By the time I have typed it out I often find I don't need the songbook!

As an ex Scout Leader I remember the emphasis placed in our training (for training Scouts):
"What I hear, I forget;
What I see, I remember;
What I do, I know;"

In other words, hand- on experience beats seeing it on a black board, or in a book, but both are better than just being told with no visual input!

Nigel