Anyone explain why all the endings,Barry

Hi Folks, You could try this.

To make it simple I quote the Key of CMaj.

If backing a singer, or, playing for yourself. When you reach the end of a tune
and are about to hit the last chord CMaj to finish, Don't hit Cmaj, hit Ab. then play around with Fm7 and Fm6 and finish on CMaj.
I say play around with Fm7, Fm6, because playing around will teach you the better ways and alternative ways to finish the tune. It's good practice, and makes no difference If playing by ear or reading.
I know Barry reads. And John. If playing in another key simply transpose the chords to suit the key you are playing in.
Regards.
Joe.