Bounce Rate
The percentage of single-page visits or visits in which the person left your site from the entrance (landing) page. If someone comes to your site, does not click on anything and leaves, that is a bounce. This applies to every analytics tool, including Google Analytics.
In the case of a single page website, there is one important nuance to be aware of. People who click on links that go to other websites will also be counted as a bounce because that click (and it is just the way the web works and not any tool) gets recorded by the other website (i.e., it shows up in their reports as a referrer).
In the case of a single page website, there is one important nuance to be aware of. People who click on links that go to other websites will also be counted as a bounce because that click (and it is just the way the web works and not any tool) gets recorded by the other website (i.e., it shows up in their reports as a referrer).


