Bounce Rate is the percentage of single-page sessions.

Is a good indicator when it comes to determining the relevance and quality of your website. A bounce is defined as a single-page session, when it comes to percentages a high bounce rate is considered as bad, as it often indicates that users have not found your site enticing enough to click through the rest of the site. Another reason why high bounce rates are considered as a negative is because of relevance, if a person has searched “Red Shoes” and an Ad appears that sells black trainers then users will leave the site instantly as it has no relevance to their search nor their needs. Bounce rates are considered to be a concern over 50%, with anything under 30% considered to be very good.