I'm wondering, every band got logo. Even some bands that I recently see have more than one logo. Do they (the logo) represent/define their styles or character when playing their music? And what're the ideas (or what for) of more than one logo for one band?
The logo is an intrical part of the band. Some bands, in the beginning, spend almost as much time designing their logo as they do creating the music. It's got to be right. It's got to define who they are, or project an image of who they want to be.
You see this, and you know exactly who that band is, right? That is how important a logo is, particularly for branding.
Other bands want to create a certain "atmosphere" with their logo. This is the logo for Thou Art Lord, a Black Metal band.
As you can see, logos are definitely important for branding purposes, as well as instant identification by fans and even with fans.