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By Mitch Chadban — SEO & Marketing Strategist, Australia  |  Updated April 2026    

Technical SEO Checklist (Plain English): Speed, Indexing & Site Health

Technical SEO is the stuff that decides whether your site can load fast, get crawled, and actually show up in search—before your content and backlinks even get a fair shot.

The good news: you don’t need to be a developer to manage it. You just need a simple checklist, a few tools, and the confidence to spot the “this is blocking growth” problems quickly.

This guide gives you a practical technical SEO checklist focused on three things that move the needle in 2026:

  1. Speed (Core Web Vitals)
  2. Indexing (crawl + index control)
  3. Site health (errors, duplication, hygiene)
On this page
The 10-minute triage: what to check first Part 1 — Speed checklist Part 2 — Indexing checklist Part 3 — Site health checklist I can run this for you The “founder version” audit (30 minutes) FAQ: Technical SEO checklist

The 10-minute triage: what to check first

If you’re time-poor, do these in order:

  1. Can Google access your site and key pages? (robots/noindex)
  2. Are your important pages indexed? (Search Console)
  3. Are your pages slow or unstable? (Core Web Vitals)
  4. Any major site errors? (404s, redirects, canonicals, HTTPS)

Most “SEO isn’t working” situations are one of those.

Part 1 — Speed checklist

Google’s Core Web Vitals targets remain the clearest performance benchmarks:

  • LCP (load): ≤ 2.5s
  • INP (interactivity): < 200ms
  • CLS (visual stability): < 0.1

INP replaced FID as the responsiveness metric.

Speed checklist (non-technical-friendly)

1) Check Core Web Vitals in Search Console

This shows real user performance data.

2) Run PageSpeed Insights on your top 5 money pages

Look for LCP element issues, render-blocking scripts, heavy fonts.

3) Fix the “big 3” causes of slow sites

  • Oversized images (especially hero banners)
  • Too many tracking scripts
  • Cheap hosting or overloaded servers

4) Kill layout shift (CLS)

  • Set image/video dimensions
  • Avoid injecting banners above content
  • Load fonts properly (or use system fonts)

5) Don’t optimize blindly

Speed is page-by-page. Your pricing page matters as much as your homepage.

Part 2 — Indexing checklist

Indexing problems are usually self-inflicted:

  • robots.txt blocking key areas
  • accidental noindex
  • weak internal linking
  • messy canonical tags
  • broken redirects

Indexing checklist

6) Confirm you’re not blocking Googlebot (robots.txt)

7) Use noindex correctly

robots.txt is not the right way to prevent indexing.

8) Submit a sitemap

A sitemap helps discovery but is not a guarantee of indexing.

9) Use URL Inspection in Search Console

10) Internally link important pages

11) Watch duplicate versions

  • / and /index
  • http vs https
  • www vs non-www
  • UTM parameter versions
  • duplicate category/tag archives

12) Use proper 301 redirects when moving URLs

Part 3 — Site health checklist

Site health checklist

13) Fix 404s that get traffic or links

14) Clean up redirect chains

15) Ensure HTTPS consistency

16) Prioritise mobile usability

17) Don’t index thin/utility pages

  • internal search result pages
  • staging/dev environments
  • filter combinations generating thousands of URLs

18) Use structured data correctly

I can run this for you

If you’d rather not handle this yourself, I can run this technical SEO checklist for you—identify blockers and prioritise fixes.

Contact me
with your site URL and tell me what matters most right now: more leads, more demos, or more organic traffic.

The “founder version” audit (30 minutes)

  1. Check Page Indexing report for spikes in “Not indexed”
  2. Check Core Web Vitals report for Poor templates
  3. Confirm sitemap is submitted and processed
  4. Run URL Inspection on one key underperforming page

FAQ: Technical SEO checklist

What is a technical SEO checklist?

A set of checks ensuring your site can be crawled, indexed, and served fast.

What Core Web Vitals benchmarks should I aim for?

LCP ≤ 2.5s, INP < 200ms, CLS < 0.1.

Why are my pages not indexing?

Common causes: robots.txt blocks, noindex tags, weak internal links, or discovery delays.

Should I submit my sitemap?

Yes. It helps discovery, though indexing is not guaranteed.

What if I changed URLs?

Use proper server-side 301 redirects based on a URL mapping.

I can run this for you

Contact me
with your site URL and tell me what matters most right now: more leads, more demos, or more organic traffic.        

Further Reading