Technical SEO is two groups, not a spectrum
Technical SEO is usually presented as a score to nudge upward. Across 1371 South West businesses it does not behave like one.
418 score a perfect 100. 99 score zero. The median is 88 and the middle is comparatively empty.
| Technical score | Businesses |
|---|---|
| 0 | 99 |
| 1–24 | 21 |
| 25–49 | 75 |
| 50–74 | 152 |
| 75–99 | 606 |
| 100 | 418 |
Why it clusters at the ends
Section titled “Why it clusters at the ends”The checks are not judgement calls: can the site be reached and indexed, does it declare structured data, are canonical signals coherent, is duplicate content confusing the crawl.
Those are decided once, by whoever built the site, and rarely revisited. A competently configured modern platform passes them all by default. A site built cheaply, migrated badly or left half-finished fails several at once, because one act of neglect causes all of them.
So the 99 businesses at zero are usually not making subtle mistakes. Nobody has looked. That is good news: it is the cheapest category of problem in this index to fix, and the only pillar where one afternoon can move a business from the bottom group to the top.
What to check, in order of how often it is the actual cause
Section titled “What to check, in order of how often it is the actual cause”1. Can search engines reach the site at all? A robots.txt blocking more than intended, a noindex surviving a rebuild, a staging site still live. This causes more zero scores than everything else combined and is invisible from the front end — the site looks perfect to you. See indexing and crawling.
2. Does the site say what it is? Structured data — LocalBusiness at minimum, with real address, hours and phone. It also feeds AI search presence, where local firms do worst.
3. Is there one canonical version of each page? http and https, www and bare, trailing slash and not. Every duplicate splits whatever authority a page has earned — see duplicate content.
4. Is the sitemap honest? Listing pages that 404 or redirect teaches crawlers to trust it less. Fewer accurate URLs beat more optimistic ones.
The part worth being honest about
Section titled “The part worth being honest about”Technical is 20% of the Digital Visibility Score and it is the pillar where local businesses already do best. Fixing it moves you out of the bottom group; it does not move you to the top of your sector, because most competitors already pass.
Treat it as a floor to clear rather than an advantage to build. At zero it is urgent and cheap. At 100, the work is somewhere else entirely — most likely the two pillars where nearly everyone is failing.
Figures recomputed at build time from the published datasets, 1371 businesses across the South West.