Search Engine Land maintains the best single map of SEO I've found. It has 44 elements across seven groups, and for most small and medium businesses, about a dozen of them decide the outcome in the first year.
That isn't a knock on the table. It's a complete reference and it's meant to be. But a complete reference and a work order are different documents, and clients keep getting handed the first one when what they needed was the second.
Here's how I read each group for a business with one person doing marketing, or nobody.
Most content advice is really volume advice — publish more, publish weekly. The elements that pay for a smaller business are relevance and depth, on pages you already have. A dental practice with eight thin service pages does better turning three of them into pages that answer what people actually ask than adding twelve more. Freshness matters in some verticals and barely at all in others. If your service hasn't changed in five years, the page doesn't need to either.
This is where small-business sites are usually broken, and it's the group nobody can see. Crawling, URLs, duplicates, mobile. Nothing here wins you anything — it stops you losing. A site builder's defaults can generate several versions of the same page, Google picks one, and it's often not the one you'd have picked. Worth looking at once, worth fixing properly, then mostly leave it alone.
Structured data and the markup that tells Google what a page is. The return here is uneven. If you have locations, hours, services and reviews, it's worth doing. On a five-page brochure site it's a checkbox that changes nothing. It depends on whether you have data worth marking up.
Experience, expertise, authority, trust. This group gets talked about as though it were a score you can raise directly. It isn't. It's whether a person can tell you're a real business. Named people, a real address, case detail with specifics in it, reviews you didn't buy. Most of what moves this is the same work that makes a prospect trust you on the phone.
Still matters, still the hardest thing to do honestly, and still the thing agencies most often bill for and least often deliver. For a local trades business, a few genuine local citations and a supplier linking to you does more than a link-building retainer. If someone is selling you volume here, ask where the links come from.
Speed, ease, whether the page gives someone what they came for. This is the group I'd start with, because it's the only one where the work pays off whether or not you rank. A faster page that answers the question converts the traffic you already have. Everything else in the table is about getting more people to that page.
Core Web Vitals and the speed metrics. Real, measurable, and consistently over-weighted in how it gets sold. Being slow hurts. Being slightly faster than adequate doesn't buy much. Fix a genuinely slow site, don't spend a quarter chasing a score.
User and Architecture, in that order. They're the two groups where the work holds its value no matter what Google changes next, and they're the two most likely to be quietly broken on a site that's never been audited.
The table itself, all 44 elements and the definitions behind them, is Search Engine Land's work. It's worth reading once end to end.
Read it on Search Engine Land
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