The technical SEO checklist that actually matters in 2026

Crawlability and indexing

Start with reality, not theory: pull your log files and Search Console index coverage. The question is simple — are the pages you want ranked being crawled, rendered and indexed?

Common culprits: bloated XML sitemaps full of non-canonical URLs, faceted navigation generating millions of crawlable combinations, and noindex tags left over from staging.

• Submit clean sitemaps of only indexable, canonical URLs
• Block or canonicalize parameter and faceted URLs deliberately
• Fix soft 404s and thin pages that dilute crawl budget

Core Web Vitals

LCP, INP and CLS are both ranking inputs and conversion factors. Field data (CrUX) is what counts, not lab scores.

The highest-leverage fixes are usually server response time, render-blocking resources, unoptimized images and layout shifts from late-loading elements.

JavaScript rendering

If your critical content and links only exist after client-side hydration, you're gambling on the render budget. Server-render or statically generate anything that needs to rank.

Test with the URL Inspection tool's rendered HTML — not just the raw source.

Architecture and internal links

Flat, logical architecture with deliberate internal linking distributes authority and helps both search engines and users understand your topical structure.

Every important page should be reachable within a few clicks of the homepage and linked from relevant contextual content.

AI crawler accessibility

Newer to the checklist: confirm that GPTBot, ClaudeBot, PerplexityBot and Google-Extended aren't blocked at your CDN or in robots.txt unless that's a deliberate choice.

Publishing an llms.txt file and keeping key content server-rendered helps AI systems understand and cite your site.