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The Complete SEO Checklist for 2026

28 June 2026 11 min read

Search changed more in the last two years than in the previous ten. This checklist is what we actually run inside Nexon Digital Studio audits before touching a single keyword.

Technical foundation

If crawling and rendering are broken, nothing else matters.

  • Clean, crawlable HTML rendered server-side
  • XML sitemap that matches live, indexable routes
  • robots.txt that allows search and AI crawlers
  • Canonical tags on every page
  • Core Web Vitals: LCP under 2.5s, INP under 200ms, CLS under 0.1
  • HTTPS, no mixed content, no redirect chains

On-page optimisation

Every indexable page needs a job and a query it is trying to win.

  • Unique title under 60 characters with the primary keyword
  • Meta description under 160 characters written for clicks
  • One H1 per page, logical H2/H3 structure
  • Descriptive alt text on every meaningful image
  • Internal links from high-authority pages to money pages

Content that earns rankings

Search engines reward depth plus originality. Build topic clusters around a pillar page, refresh decaying posts quarterly, and add original data, screenshots or expert quotes that no competitor can copy.

Off-page and authority

Focus on digital PR, niche partnerships and unlinked-brand-mention reclamation rather than bulk directories. Fifty relevant links will beat five hundred irrelevant ones every time.

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