Niche and mainstream products

Mainstream -
This is trargeted for a wide audience, it has many aspects of what people are interested in within in it. It has a wide readership and has a high circulation figure. Kerrang is a mainstream magazine.

Niche -
Niche means that a magazine has a smaller audience and is targeted for a small number of people, this tends to be to more specific types of music rather than a variety. Heavy crash metal and classical music can be considered as niche.