Technical SEO Checklist: 20 Fixes That Actually Impact Rankings
A prioritized technical SEO checklist for service business websites — what to fix first, why it matters, and how to verify it's done.
Most technical SEO guides give you a 150-point checklist that will never get done. This one gives you the 20 items that actually move rankings, prioritized by impact.
Priority 1: Foundation (Fix These First)
1. Crawlability — Can Google find your pages? Check robots.txt isn’t accidentally blocking anything. Verify your sitemap is submitted to Google Search Console.
2. HTTPS everywhere — No exceptions. Every page, every redirect. Mixed content warnings kill trust signals.
3. Canonicalization — Every page needs a canonical tag pointing to the preferred version. www vs non-www, trailing slash vs no slash — pick one and be consistent.
4. Core Web Vitals — LCP, CLS, and INP. These are now confirmed ranking signals. Check yours in Search Console > Core Web Vitals.
5. Mobile-first — Google crawls the mobile version of your site. If it breaks on mobile, you’re fighting Google instead of working with it.
Priority 2: Indexing Signals
6. Title tags — Unique, compelling, under 60 characters. Front-load the keyword. Write them for humans who are scanning search results.
7. Meta descriptions — Not a direct ranking factor, but affects CTR. Keep them under 155 characters and write them as ads.
8. H1 tags — One per page. Should include your primary keyword naturally.
9. URL structure — Short, readable, keyword-included. /services/local-seo/ beats /services/?id=14.
10. Internal linking — Are your most important pages getting links from other pages on your site? Orphaned pages don’t rank.
Priority 3: Speed Optimisation
11. Image optimisation — Use WebP/AVIF. Compress everything. Add descriptive alt text. Lazy-load below-the-fold images.
12. Remove render-blocking resources — JavaScript and CSS that block first paint. Defer or async where possible.
13. Leverage browser caching — Set proper Cache-Control headers. Your host or CDN handles this.
14. Use a CDN — If you’re not on a CDN, your TTFB (Time to First Byte) is hurting you. Cloudflare’s free tier is fine.
15. Minimize unused JavaScript — The single biggest killer of PageSpeed scores. Audit with Chrome DevTools Coverage tab.
Priority 4: Structured Data
16. LocalBusiness schema — Essential for local businesses. Tells Google exactly what you do and where.
17. FAQ schema — Expands your search snippet, takes up more SERP real estate.
18. Breadcrumb schema — Helps Google understand your site structure.
19. Service/Product schema — Adds rich result eligibility on service pages.
20. Article schema — For blog posts. Improves content discovery.
How to Verify
Use these tools to check your work:
- Google Search Console — the source of truth for indexing issues
- PageSpeed Insights — Core Web Vitals and performance scores
- Rich Results Test — validates your structured data
- Screaming Frog (free up to 500 URLs) — crawl your own site
- ahrefs Webmaster Tools (free) — broken links, orphaned pages
Technical SEO is a one-time investment that pays dividends for years. Get it right once, maintain it, and it becomes invisible infrastructure that helps everything else work better.