Technical SEO Checklist for Website Monitoring

Technical SEO is the foundation that makes your content findable. If search engines cannot crawl your pages, render your content, or understand your site structure, it does not matter how good your content is. This checklist focuses on the technical SEO items that can be monitored on an ongoing basis, catching issues before they affect your rankings.

For site maintenance guidance, see our website maintenance and monitoring guide.

Crawlability

Search engines need to access your pages. These items ensure nothing is blocking them.

robots.txt

• [ ] Your robots.txt is accessible at yourdomain.com/robots.txt
• [ ] It does not block important pages or directories
• [ ] CSS and JavaScript files are not blocked (Googlebot needs them for rendering)
• [ ] Your sitemap URL is referenced in robots.txt
• [ ] No unintended Disallow: / that blocks the entire site
• [ ] Changes are tested before deployment

Monitor: Check robots.txt regularly for unintended changes, especially after CMS updates or deployments.

XML sitemap

• [ ] Your sitemap is accessible and returns valid XML
• [ ] It contains only indexable pages (200 status, no noindex, no redirect)
• [ ] It is submitted to Google Search Console and Bing Webmaster Tools
• [ ] lastmod dates reflect actual content changes
• [ ] The sitemap is under 50,000 URLs and 50MB per file
• [ ] A sitemap index is used for larger sites

Monitor: Track sitemap error counts in Google Search Console. Watch for spikes in "Not found (404)" or "Redirected" URLs.

Internal linking

• [ ] Every important page is reachable within 3-4 clicks from the homepage
• [ ] No orphan pages (pages with no internal links pointing to them)
• [ ] Broken internal links are identified and fixed
• [ ] Redirect chains within internal links are cleaned up

Monitor: Run periodic crawls with tools like Screaming Frog to detect broken links and orphan pages.

Indexing

Getting crawled is step one. Getting indexed is step two.

Index coverage

• [ ] Google Search Console Pages report shows no unexpected exclusions
• [ ] Pages you want indexed are actually indexed (check with site: queries)
• [ ] Pages with "Crawled - currently not indexed" are reviewed for content quality
• [ ] Pages with "Discovered - currently not indexed" are evaluated for internal linking
• [ ] Noindex tags are only on pages you intentionally want excluded

Monitor: Check the Pages report in Search Console weekly. Look for sudden drops in indexed page counts.

Canonical tags

• [ ] Every page has a self-referencing canonical tag
• [ ] Canonical tags point to the correct preferred URL version
• [ ] Canonical tags use absolute URLs (not relative)
• [ ] Canonical tags are not contradicted by hreflang, sitemap, or redirect signals
• [ ] Paginated pages have appropriate canonical handling

Monitor: Crawl your site periodically and check for pages with missing, duplicate, or conflicting canonical tags.

Duplicate content

• [ ] One canonical version exists for each page (no www/non-www, HTTP/HTTPS, trailing slash duplication)
• [ ] URL parameters that create duplicate pages are handled (canonicalized or blocked)
• [ ] Faceted navigation does not create thousands of indexable duplicate pages
• [ ] Printer-friendly pages are not separately indexed

Monitor: Search Console will report duplicate content issues in the Pages report. Watch for "Duplicate without user-selected canonical" and "Duplicate, Google chose different canonical."

HTTPS and Security

SSL/TLS

• [ ] Your entire site loads over HTTPS
• [ ] HTTP requests redirect to HTTPS (301 redirect)
• [ ] SSL certificate is valid and not expiring within 30 days
• [ ] No mixed content warnings (HTTPS pages loading HTTP resources)
• [ ] HSTS header is set

Monitor: Use SSL monitoring to check certificate validity and expiry. See SSL certificate monitoring guide. Check for mixed content with browser developer tools.

Site security

• [ ] No malware warnings in Google Search Console
• [ ] Site is not listed on Google Safe Browsing blacklist
• [ ] No security issues flagged in Search Console's Security Issues report

Monitor: Google Search Console sends email alerts for security issues. Set up additional monitoring for Safe Browsing status.

Page Speed and Core Web Vitals

Largest Contentful Paint (LCP)

• [ ] LCP is under 2.5 seconds for at least 75% of page loads
• [ ] The largest content element (hero image, main heading) loads quickly
• [ ] Images are optimized (compressed, properly sized, using modern formats)
• [ ] Server response time (TTFB) is under 500ms

Interaction to Next Paint (INP)

• [ ] INP is under 200ms for at least 75% of interactions
• [ ] No long JavaScript tasks blocking the main thread
• [ ] Third-party scripts are loaded asynchronously

Cumulative Layout Shift (CLS)

• [ ] CLS is under 0.1 for at least 75% of page loads
• [ ] Images and videos have width and height attributes
• [ ] Ads and dynamic content have reserved space
• [ ] Web fonts do not cause text reflow

Monitor: Track Core Web Vitals in Google Search Console (Experience report) and PageSpeed Insights. See Core Web Vitals guide and website performance monitoring.

Mobile Usability

• [ ] Your site is responsive or has a mobile-friendly design
• [ ] No mobile usability errors in Google Search Console
• [ ] Text is readable without zooming on mobile
• [ ] Tap targets (buttons, links) are large enough and spaced apart
• [ ] Content is not wider than the screen
• [ ] Interstitials and popups do not block content on mobile

Monitor: Check the Mobile Usability report in Search Console. Test key pages with Google's mobile-friendly test.

Structured Data

• [ ] Structured data (Schema.org) is implemented for relevant content types
• [ ] No errors in the Rich Results report in Search Console
• [ ] Schema markup is valid (test with Google's Rich Results Test)
• [ ] Structured data accurately represents the page content (no spam markup)

Monitor: Check the Enhancements reports in Search Console for structured data errors.

International SEO (if applicable)

• [ ] Hreflang tags are correctly implemented for all language/region variants
• [ ] Hreflang return links are present (bidirectional)
• [ ] Self-referencing hreflang tags are on every page
• [ ] No hreflang errors in Search Console

Monitor: Check the International Targeting report (Legacy tools) in Search Console for hreflang errors.

Site Architecture

• [ ] URL structure is logical and consistent
• [ ] Breadcrumbs are implemented
• [ ] Navigation is crawlable (not JavaScript-dependent without fallbacks)
• [ ] Pagination is handled correctly (rel="next"/"prev" if used, or self-canonicalized pages)
• [ ] 404 pages return proper 404 status codes (not soft 404s)
• [ ] Redirect chains are no longer than one hop

Monitor: Periodic crawls to check URL structure, redirect chains, and 404 errors.

Monitoring Schedule

Daily (automated):

• Uptime monitoring
• SSL certificate monitoring
• DNS monitoring

Weekly (10-15 minute review):

• Google Search Console: Pages report, Core Web Vitals, Security Issues
• Monitoring dashboard: trends in response time, error rates

Monthly (30-60 minute review):

• Full site crawl with Screaming Frog or similar
• Broken link check
• Redirect chain audit
• Structured data validation

Quarterly (1-2 hour audit):

• Full technical SEO review against this checklist
• robots.txt and sitemap audit
• International SEO review (if applicable)
• Competitive technical benchmarking

Summary

Technical SEO requires ongoing attention, not a one-time setup. This checklist covers the items that affect crawlability, indexability, security, performance, and site structure. Automate monitoring for the items that can be checked continuously (uptime, SSL, DNS, Core Web Vitals). Review Search Console weekly. Run comprehensive audits quarterly. The goal is catching technical issues before they affect your search visibility.