A bounce is an event that occurs when a user arrives on a website or web application and then leaves viewing any other pages or interacting with the page in any way. Think of pushing a button or scrolling on the page, as this is also interacting.
Bounces are an important metric in Google Analytics because they provide insight into your users' engagement and interest. Bounces can help you identify opportunities to keep users engaged and interested.
You can access bounces in the Audience > Overview report in Google Analytics. This report shows the bounce rate for your website, the total number of bounces, and the total number of sessions. This gives you a global overview. The report also shows the bounce rate for different segments of users, such as by source, medium, device, and geographic location.