Bounce rate is the percentage of visitors who leave after viewing only one page without further interaction. High bounce rates can signal that content or experience is not meeting expectations.
Bounce rate measures single-page sessions. A high rate is not always bad — a blog answer that fully satisfies the reader may have a high bounce rate legitimately.
Not directly, but poor engagement can indirectly reflect content quality issues.
It varies by page type; compare against similar pages, not a fixed number.