Sessions vs Page Views vs Users — What Each One Actually Counts

"Sessions are the number of visitors, right?" "Page views are high, so traffic is healthy." These are the most common mix-ups I hear from people starting out with web analytics. Sessions, page views, and unique users (UU) look similar but mean different things, are counted differently, and are used for different decisions. This article walks through what each of the three metrics actually counts, how they relate, which one to look at first, and how GA4 treats them under its event-based measur...