A bounce occurs when a web site visitor only views a single page on a website, that is, the visitor leaves a site without visiting any other pages before a specified session-timeout occurs. There is no industry-standard minimum or maximum time by which a visitor must leave in order for a bounce to occur. Rather, this is determined by the session timeout of the analytics tracking software.
A visitor can bounce by:
- Clicking on a link to a page on a different web site
- Closing an open window or tab
- Typing a new URL
- Clicking the “Back” button to leave the site
Session time out – A commonly used session time out value is 30 minutes[2]. In this case, if a visitor views a page, doesn’t look at another page, and leaves his browser idle for longer than 30 minutes, they will register as a bounce. If the visitor continues to navigate after this delay, a new session will occur.
The Bounce Rate for a single page is the number of visitors who enter the site at a page and leave within the specified timeout period without viewing another page, divided by the total number of visitors who entered the site at that page. In contrast, the Bounce Rate for a web site is the number of web site visitors who visit only a single page of a web site per session divided by the total number of web site visits.
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