A bounce occurs when a website visitor leaves a page or 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 commonly used[citation needed] session timeout value is 30 minutes. In this case, if a visitor views a page and leaves his browser idle for 31 minutes, they will register as a bounce. If the visitor continue to navigate after this delay, a new session will occur and the last page they view before exiting or timing out again will result in another bounce.
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 website is the number of web site visitors who visit only a single page of a website per session divided by the total number of website visits.
Bounce rates can be used to help determine the effectiveness or performance of an entry page. An entry page with a low bounce rate means that the page effectively causes visitors to view more pages and continue on deeper into the website. [2]
Google.com analytics specialist Avinash Kaushik has stated, "It is really hard to get a bounce rate under 20%, anything over 35% is cause for concern, 50% (above) is worrying." [3]
A visitor can bounce by:
- Closing an open window or tab
- Typing a new URL
- Clicking the "Back" button to leave the website
- Session timeout
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