Rankings don't fall overnight — they erode one forgotten setting at a time. Run this 20-point check monthly and you'll catch problems while they're still cheap to fix.
A checklist you run once is worthless; one you run monthly is gold. Put it on a calendar, not a todo list. Each pass should take 20–30 minutes: skim the 20 points, mark what changed, and fix only what's red. Over a year this catches the slow erosion — a broken internal link from a redesign, a page that quietly dropped from index, a title someone overwrote — before any of it costs rankings. The audit tool handles the mechanical pass; your eyes handle the judgment the tool can't.
This is a health check, not a growth plan. It won't tell you which new topic to write, or whether a competitor just launched a better page. Those are strategy questions for a different day. What it guarantees is that the foundation underneath any strategy stays solid — because the best content in the world can't rank on a site that fails points 1 through 5. Run the free audit for the numbers, then use this list to decide what the numbers mean for your site.
If you only have one afternoon, work the list in this order: fix crawl errors first (a page Google cannot reach is worse than a weak page), then indexation (titles, canonicals, noindex mistakes), then performance. Polish like structured data and monitoring comes last because it rarely blocks traffic on its own. The order matters more than the count — ten fixed crawl errors beat a hundred tweaked meta descriptions.
Turn the 20 points into a single checklist you actually reuse. Print the crawlability and on-page sections, tick them off per template rather than per page, and you will cover a whole site in an hour. The goal is not to admire the list but to run it on a schedule — once a month for a small site, weekly during a rebuild. Consistency is the entire game.