Bounce rate is the share of visitors who arrive on your site and then leave without clicking to another page or taking any action. If ten people land on a page and eight leave without doing anything else, that page has a high bounce rate.
For a small business, the number is useful but easy to misread. A high bounce rate can mean a page is slow, confusing, or not what the visitor expected. It can also mean the opposite: someone searched your phone number, landed on your contact page, found exactly what they needed, and left satisfied. The same figure tells two different stories depending on what the page is for.
That is why bounce rate is a question, not a verdict. You read it inside Google Analytics alongside what a page is meant to do, and you pay closest attention when a page built to move people toward a call or a booking, a page with a real conversion job, is losing them before they act. On its own the number rarely tells you what to fix; in context it points to where to look.