Niche Site
A website focused on a single, specific topic or audience rather than covering broad, general subject matter.
Definition
A niche site narrows its focus to a specific topic, product category, or audience segment - for example, a single health condition, a type of outdoor gear, or a local service category - instead of trying to cover a broad subject.
Narrow focus makes a site easier to rank for its target keywords, easier to monetize with a clear offer, and easier for a buyer to evaluate, since the traffic and audience intent are well defined.