The bounce rate is a metric used in web analytics. It indicates the percentage of sessions that end without the visitor interacting further with the website. If there are 400 bounces out of 1,000 sessions, the bounce rate is 40%.
For a long time, any session in which only a single page was viewed was considered a bounce. Newer analytics tools, such as Google Analytics 4, define the term more narrowly: a session is counted as a bounce if it is not considered interactive—for example, if it is very short, no additional pages are viewed, and no defined action is taken.
The bounce rate thus shows how many visitors leave a page without engaging further with it. However, this metric alone does not reveal why they leave.