Bounce rate (online marketing)

As a rule of thumb, a bounce rate in the range of 26 to 
40 percent is excellent. 41 to 55 percent is roughly 
average. 56 to 70 percent is higher than average, but 
may not be cause for alarm depending on the website. 
Anything over 70 percent is disappointing for everything 
outside of blogs, news, events, etc.

Bronnen

• http://www.gorocketfuel.com/the-rocket-blog/whats-the-average-bounce-rate-in-google-analytics/