Different religions have different kinds of music related to them, You cam tell what religion people follow by the traditional music they listen to. For example if a muslim person sings Muslim songs you know what they believe in.
You can easily tell at times if someone is part of a subculture, for example if someone is a rocker you know because of style. The reason that they wear those clothes is because the artists wear them.
Tradition can be linked to stories, songs, music, a football club or many other things. it can be an easy way to identify someone.