Technical SEO is the foundation that great content is built on. You can produce the most insightful, comprehensive, beautifully written article in your niche — and if your site has crawling issues, duplicate content problems, or Core Web Vitals failures, that article will underperform systematically.
This checklist covers the most impactful technical issues for content-heavy websites. Work through it methodically, prioritise by estimated impact, and track changes so you can attribute ranking improvements accurately.
Crawlability and Indexation
1. Verify your robots.txt is not blocking important content. This is embarrassingly common. A single misconfigured robots.txt line can block your entire content library from being crawled. Fetch your robots.txt at yourdomain.com/robots.txt and verify it allows Googlebot access to your pages, CSS, and JavaScript.
2. Check your XML sitemap. Submit a clean XML sitemap via Google Search Console. It should include only canonical, indexable URLs — no noindex pages, no redirect chains, no 404s. Keep it under 50,000 URLs per file and regenerate it automatically when you publish new content.
3. Audit your index coverage report in Search Console. Look for unexpected “Not indexed” patterns. Common culprits: duplicate content issues, crawl budget exhaustion on large sites, and pages accidentally tagged noindex.
4. Eliminate crawl traps. Infinite scroll, faceted navigation, and URL parameter combinations can generate millions of near-duplicate URLs and exhaust your crawl budget. Use rel=canonical and URL parameter handling in Search Console to manage these.
Site Speed and Core Web Vitals
Core Web Vitals (LCP, INP, CLS) are now ranking factors. More importantly, they directly affect user experience, bounce rates, and conversion rates. A site that loads in under 2 seconds converts significantly better than one that loads in 4.
LCP (Largest Contentful Paint): Target under 2.5 seconds. The biggest wins typically come from: serving images in modern formats (WebP/AVIF), implementing lazy loading below the fold, using a CDN, and preloading your hero image.
INP (Interaction to Next Paint): Replaced FID in 2024. Measures the page’s responsiveness to user interaction. Reduce JavaScript execution time and break up long tasks.
CLS (Cumulative Layout Shift): Prevent unexpected visual jumps by specifying width and height on all images and video elements, and by not injecting content above existing content after load.
Use PageSpeed Insights and the Chrome User Experience Report for field data. Lighthouse provides lab data — useful for diagnosis but not representative of real-user performance.
URL Structure and Architecture
A logical URL structure helps both users and crawlers understand your site’s hierarchy.
- Keep URLs short, descriptive, and lowercase
- Use hyphens, not underscores, to separate words
- Reflect your content hierarchy: /services/seo/ not /page?id=45
- Avoid stop words (and, the, of) in URLs
- Never change URLs of ranking pages without 301 redirects
Duplicate Content
Content-heavy sites are particularly susceptible to duplicate content issues. Common causes:
- HTTP vs HTTPS versions of pages (fix with HTTPS redirect + canonical)
- www vs non-www versions (fix with consistent canonical + redirect)
- Trailing slash inconsistency (/blog vs /blog/)
- Tag pages, category pages, and archive pages creating thin duplicate content
- Printer-friendly versions of pages
- URL parameters creating duplicate views of the same content
For each case, the fix is either: consolidate with a redirect, or specify the canonical URL explicitly.
Structured Data
Structured data (Schema.org markup) helps search engines understand your content and can unlock rich results in SERPs — articles with author information, FAQs, how-to guides, and star ratings for reviews all get enhanced SERP display.
For a content website, implement:
- Article/BlogPosting schema on every article
- BreadcrumbList for site hierarchy
- FAQPage on pages containing FAQ sections
- Organization schema on your homepage
- Person schema on author profile pages
Test all implementations with Google’s Rich Results Test tool.
Internal Linking
Internal links are how you distribute PageRank through your site and signal to Google which pages are most important.
Audit your internal linking structure: identify pages with very few internal links (orphan pages), identify your highest-value pages and ensure they receive links from high-traffic pages, and use keyword-rich anchor text (while keeping it natural).
Create topic cluster structures where pillar pages link to supporting articles and vice versa. This architecture signals topical authority and concentrates link equity in the right places.
Mobile and Accessibility
Google uses mobile-first indexing — the mobile version of your site is the one that gets crawled and indexed. Test your site on actual mobile devices, not just desktop browser simulations.
Ensure touch targets are large enough (minimum 44x44px), font sizes are readable without zooming (minimum 16px body text), and content doesn’t require horizontal scrolling.
A technically sound, mobile-optimised, fast-loading site is the prerequisite for everything else in SEO to work.