If you only ever managed one production URL, a single tool tab might be enough. The moment you support a small portfolio, “multi site performance monitoring” becomes a different job: you need a shared place to see which properties are green, which need attention, and which tests ran last week without opening five bookmarks and three spreadsheets. This product spotlight is about how Apogee Watcher keeps that work in one dashboard so agency teams are not re-learning a new surface for every account. Why “one login per client” breaks down A common starting pattern looks sensible at two or three sites: create a free account in a speed tool for Client A, another for Client B, export PDFs, file them. Past roughly five properties the cracks show. Credentials scatter, renewal dates do not line up, and the person who “owns” the PageSpeed account for Client C left six months ago. You end up with performance data in more places than the code you ship.…