most technical SEO audits go wrong the same way: 200 items long, with no order to work through them. fix schema markup before you’ve fixed indexation, and you’ve just polished a page Google was never going to show anyone.
so here’s the checklist in the sequence i’d actually run it — not alphabetical, not by tool tab.
1. indexation comes first, always
none of the rest of this matters if the page isn’t indexed.
- reconcile the indexed count in Search Console against your actual sitemap URL count — “crawled” and “indexed” aren’t the same thing, and that gap is usually where the real trouble hides
- strip noindex tags off any revenue page — more common than it should be, usually a leftover from a staging-to-production move that never got cleaned up
- resolve canonical signals that disagree with each other across rel=canonical tags, hreflang, and the sitemap — three sources of truth in conflict is a quiet, common way to kill rankings
- clear out soft 404s and thin, near-duplicate pages before asking for a re-crawl
2. crawlability is the layer underneath
- check robots.txt for an accidental global block — a Disallow: / left over from staging is the single most common self-inflicted wound here
- confirm XML sitemaps are well-formed and within the size limit
- keep anything you want ranked within 3-4 clicks of the homepage — pages buried deeper get crawled less often and indexed slower
- watch server response stability under crawler load; a site that times out for Googlebot is timing out for real visitors too
3. Core Web Vitals — where the 2026 thresholds sit
one confirmed ranking signal, three metrics inside it:
- LCP (Largest Contentful Paint): under 2.5 seconds at the 75th percentile, mobile
- INP (Interaction to Next Paint): under 200ms — the metric that replaced FID, and the one most sites still haven’t gotten around to
- CLS (Cumulative Layout Shift): under 0.1
mobile scores on Core Web Vitals typically come in noticeably worse than desktop on the same page, since Google evaluates the mobile version by default. checking only your desktop numbers means missing exactly the gap that’s costing you rankings.
4. structured data is pulling double duty now
schema markup used to exist for rich snippets. in 2026 it’s also become part of how AI systems and answer engines read and cite a page. JSON-LD is the format to standardize on, and everything should get validated through Schema.org’s tooling before it ships — bad schema can do more damage than no schema at all.
5. keep the loop running
a technical audit isn’t a one-time project, it’s a cadence. check Core Web Vitals and indexation weekly (Search Console works, or Semrush if you want the trend lines centralized), and run the full crawl-and-indexation pass quarterly, or right after any CMS, plugin, or migration change — that’s when regressions actually show up.
the shortcut everyone skips
skip the 200-point spreadsheet and ask three questions in order: is the page indexed, can it be crawled, does it hold up under load? nine times out of ten, “why isn’t this ranking” gets answered somewhere in those first two sections — long before schema or structured data even enters the conversation.
start scaling — a technical audit that isn’t sequenced correctly wastes a quarter fixing things that don’t move rankings yet. let’s connect if you want the audit run in the right order the first time.
Sources: Google’s published Core Web Vitals thresholds; industry technical SEO checklists (UniK SEO, Digital Applied) for 2026 audit priorities. Figures reflect publicly documented ranking signals, not client-specific results.