Beginner warning: this is probably very trivial :-)
I was advised as a beginner to study and play music that I like, so I can see similarities and differences. I a beginner, but very keen you see, however, I have come across a weird kind of 'grouping' and don't quite know why it is there.
Do they change the way in which they are played at all?
Am I being really dumb in not understanding what it is for?
I have to admit, note duration, especially dots and ties is something I am currently trying to learn.