Bounce rate is a showing your site ranking.

Bounce rate is an Internet marketing term used in web traffic analysis. It represents the percentage of visitors who enter the site and then leave rather than continuing on to view other pages within the same site.
Bounce rate is a measure of the effectiveness of a website in encouraging visitors to continue with their visit. It is expressed as a percentage and represents the proportion of visits that end on the first page of the website that the visitor sees

Boune rate is a calculation of the percentage of visitors to given websit that leave the site after viewing just single page. The lower the percentage of bounce rate is more effective.

Bounce rate is the percentage of visitors to a particular website who navigate away from the site after viewing only one page. Bounce Rate for a page is based only on sessions that start with that page.

It is the number of visits in which a person leaves your website from the landing page without browsing any further.

Bounce rate is the percentage of people who arrive on your site and leave without visiting a second page. More importantly, Bounce Rate was designed to tell you if you have the right audience coming to your pages and if you are meeting their expectations.