Mainstream vs Niche

 When we talk about a mainstream audience we are usually referring to the audience of a product that has mass appeal and a large audience, such as blockbuster films etc.

When we talk about a niche audience we are usually referring to a media product that has a small/specific audience.  A magazine for something like model railways would be for a niche audience.

Mainstream:

Mainstream as so many people watch TV and it's a very common occurrence in everyday life. Each magazine is £2.40

Niche:

Classic Bike as not everyone are into bikes. Each magazine is £2.83