A visit starts when at least one event is recorded on a website or an application. A visit can be made of one or several events and is closed when no event is recorded for at least 30 minutes (by default).
A page view is an act to count a "page.display" event triggered when a page charge, generally.
Let's take the following navigation as an example: I'm visiting mysite.com and loading page A, then page B, back to page A and finishing with page C. In our tools, you will see the following analysis:
The different page views belong to the same visit, which appears on each line.