AAC or MP3

I don't how many of you aware there is different formates of digital
music files. Currently, most well know formates are between mp3 and
aac. Mp3 is well known of its early introduction. I always wonder what
for matter is should, because I am an iTune user. Its defeat formate
is AAC. After a little bit research, I believe the conclusion is to
use AAC formate. I am not digital music expert, so I am not explaining
here. It is just what the result show.