Sometimes simple things can be really beautiful .. like this enso circle -->
What is minimal music, let me do a simple break down for you.
By making music simple and repeating them at a constant steady pulse, over and over, do a little modification or expansion here and there. You'll create some kind of hypnotic effect.. which is why minimalism can also sometimes be labelled as trance music. Is like a circle going round and round.
When combining with pop/rock it slowly evolves into a new genre called techno.
Bet you didnt know about this earlier ..
There are quite a few famous artist who does minimal music, I'll name a few of those songs that I like down here, Michael Nyman I recommend you "The Heart Ask the Pleasure First"
Yann Tierseon - Comptine D'un Autre ete
Ludovico Einaudi - Fly (most of his songs are nice but only if you enjoy this kind of music)
John Cage - Dream
Want to know more about John Cage and his controversial piece 4'33" of silence?