It's easy to dismiss a live "who's on the site right now" view as a vanity number, something to glance at and move on from. Watching a handful of dots move across a world map is satisfying, but it earns its place on a dashboard for a few concrete reasons beyond that.
Launches and campaigns
Send a newsletter, publish a product on a launch platform, or push a paid campaign live, and a real-time view answers the one question that actually matters in the first few minutes: is it working, right now, not tomorrow's report. Seeing visitors arrive within seconds of hitting send is the fastest confirmation you'll get that a link, a tag, or a tracking snippet is actually wired up correctly.
Debugging a broken deploy
If you just shipped a change and traffic quietly stops appearing in real time, that's a much faster signal than waiting for tomorrow's numbers to look off. A real-time view doubles as a lightweight uptime check for your own tracking, if it goes to zero and stays there, something's wrong.
Watching a specific session unfold
Seeing a visitor's current page, country, and device as they browse is useful in the moment, for example, watching someone move through a multi-step signup or checkout flow you just changed, to confirm the new version actually behaves the way you intended before you wait for aggregate data to catch up.
Where it isn't the point
Real-time is not a substitute for the aggregate view. It won't tell you your 30-day conversion rate, or where visitors are dropping off in a funnel, that's what goals and funnels are for. Treat it as a pulse check, not the dashboard you live in day to day.
You can see this in action on the live demo, the Online popup always shows a few visitors moving around, refreshed continuously.