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 14202 the audited sites the median SEO health is 65, with the middle half falling between 64 (25th percentile) and 65 (75th percentile). The full range runs from 30 to 94. That wide gap says the segment is not uniformly good or bad — platform defaults set a baseline, but individual configuration decides where a site lands. Compare your own score against the 75th percentile, not the median, to see what a well-run peer looks like.
The single most common problem here is “Missing recommended security headers”, present on 88% of the sample, followed by “Images without width/height (layout shift / CLS)” and “Legacy image format (jpg/png/gif) with no next-gen fallback”. 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.