A performance lead at a twelve-site agency told us their “daily monitoring” meant one person opened PageSpeed Insights on Mondays. Checkout on a retail client had been slow since the previous Thursday. The sponsor noticed first because nobody was scheduled to test that URL until the weekly marketing pass. That is what happens when pagespeed monitoring is a calendar habit instead of a configured schedule. Frequency and priority are not fine print on a retainer. They decide whether regressions show up in your tools or in a client screenshot. This guide is for teams who already run automated PageSpeed monitoring on some sites but still treat every URL the same. We cover how to pick cadence per site, which pages earn higher priority, and how monthly quotas force trade-offs you should document before sales promises outrun your test budget. Why ad-hoc PageSpeed checks fail on multi-site portfolios Manual PSI runs work for a single launch or a post-deploy sanity check.…