General definition of bounce rate
What is a bounce rate? In simple words, this is the percentage of visits to your site, as a result of which the user leaves the page without further interaction with the site, in other words, the person visited your site and left it on the same page.
This indicator indicates not only that the user does not linger on the site, but also low conversion when the goal is achieved (sale of goods, collection of lead, etc.).
By the result of the bounce rate, you can judge the quality of traffic that comes to your site. If the user does not interact with the site in any way and leaves immediately, it means that he went to the wrong address and did not find any information useful to him on the site, so you should think about the content part and page structure, as well as the whole internal site SEO.
We introduce the definition of the indicator "session"
In order to understand the bounce rate, we need to understand another indicator - the session. In the context of Google Analytics, a session is a group of activities recorded per unit of time. Actions include pageviews, transitions, clicks on items, etc. A user can generate from one or more sessions per hour, day, month or year, therefore the number of visits / sessions recorded by Google Analytics is higher than the number of users registered in analytics.
A visit to one page is a Google Analytics session that counts when a user logs into one page of your site and leaves without switching to others.
Thus, the bounce rate is the percentage of visits to one page, during which the site once sent a GIF request to the Google Analytics server.