SEO health is a 0–100 score Crawlinx computes from 157 technical checks run on every crawled page — indexability, titles and meta descriptions, canonical and hreflang correctness, internal linking, redirects, broken links and Core Web Vitals signals. A site scores high only when the whole crawl is clean, so a single median hides a spread worth reading below.
Across 9 docs sites the median SEO health is 65, with the middle half falling between 63 (25th percentile) and 65 (75th percentile). The full range runs from 43 to 67. The tight range means most sites in this segment cluster near the median, so a score much below it points to a site-specific misconfiguration rather than a platform-wide limitation.
These are all docs sites, so they face similar content and crawl patterns — comparable page depth, similar templating and often the same third-party scripts. Treat the median as the bar to clear for a docs site and the issues below as the technical debt typical of the vertical.
The single most common problem here is “Images without width/height (layout shift / CLS)”, present on 88% of the sample, followed by “Meta description too long” and “Thin content (low word count)”. The full ranking is in the table above — fix the top of that list first, since it is the fault most likely to be dragging this segment's median down.