Each visited page is considered a pageview. Multiple pageviews will typically happen within a session. Some sites might be having up to 4 pageviews per session, others could even have up to 10 pageviews per session. It could depend on the purpose of the site, its niche, the current season, et cetera.
For example, visitors could start their journey on your homepage and then navigate to a product listing page and product page. And hopefully even cart and checkout. That would then be 5 pageviews in a session.