- Verify search and AI crawler access to every priority page.
- Target LCP under 2.5 seconds, INP under 200 milliseconds, and CLS under 0.1.
- Canonical errors can split authority and confuse retrieval systems.
- Critical content should exist in the initial HTML response.
- Structured data, mobile parity, HTTPS, clean status codes, and accurate sitemaps remain essential.
Technical SEO is the foundation for both traditional organic visibility and modern AI discovery.
If crawlers cannot access a page, if canonicals conflict, if the page renders only after complex client-side execution, or if schema is invalid, even excellent content may never become eligible for strong visibility.
For a broader strategic view, pair this checklist with SEO services, AI visibility optimization, and the Schema Markup for AI Search guide.
Crawlability and AI crawler access
Start by confirming that search engines and the AI-related crawlers you intend to allow can reach the pages and assets that matter.
Confirm important pages and assets are not accidentally blocked.
Check Googlebot, Bingbot, GPTBot, PerplexityBot, ClaudeBot, and other relevant user agents.
Find broad rules that unintentionally block unlisted crawlers.
Use it as a supplemental guide, not a replacement for crawlable HTML or sitemaps.
Validate services, products, locations, pillar pages, and resources.
Submit clean sitemaps to Google Search Console and Bing Webmaster Tools.
Add direct sitemap declarations.
Review response codes, host availability, crawl volume, and recurring errors.
Allowing a crawler to reach a page does not make the page authoritative or citation-worthy. It simply makes the content available for consideration.
Indexation and canonicalization
Canonical and indexation errors can split authority, create duplicate signals, or send search and retrieval systems toward the wrong URL.
Verify only intentionally excluded pages carry noindex.
Primary indexable pages should generally point to themselves.
Check redirects, sitemaps, internal links, and hreflang for disagreement.
Point directly to the final preferred URL.
Repair broken internal links and redirect removed URLs when appropriate.
Investigate server failures, timeouts, and application errors.
Send old URLs directly to the final destination.
Ensure annotations are reciprocal, valid, and canonical.
Keep useful paginated pages crawlable and correctly canonicalized.
Use crawls and Search Console to find exclusions or index bloat.
Core Web Vitals and performance
Performance affects usability, crawl efficiency, rendering, and the reliability of the experience users and machines receive.
Optimize hero media, server response, critical CSS, and font delivery.
Reduce long JavaScript tasks and expensive handlers.
Reserve space for media, embeds, banners, and dynamic content.
Improve hosting, caching, CDN delivery, database queries, and application overhead.
Inline critical CSS and defer nonessential assets.
Do not lazy-load the primary LCP image.
Serve correctly sized and compressed modern images.
Stop loading plugin assets where they are not needed.
Use Lighthouse, CrUX, PageSpeed Insights, and real-user monitoring.
Use both lab and field data when diagnosing performance. A Lighthouse score is useful for debugging, while real-user data helps show how the site actually behaves at scale.
Structured data implementation
Structured data can clarify organizations, authors, services, local businesses, articles, FAQs, and relationships represented on a page. It should accurately reflect visible content and avoid conflicting entities.
Validate eligible pages after meaningful site changes.
Monitor invalid items, warnings, and declining valid counts.
Include official name, URL, logo, contact points, and sameAs profiles.
Include author, publisher, dates, image, headline, and canonical URL.
Keep address, phone, hours, service area, and category accurate.
Only mark up questions and answers shown to users.
Prevent themes and plugins from creating contradictory entities.
Use Schema.org validation in addition to Google testing.
See the Schema Markup for AI Search guide for a deeper implementation framework.
Mobile optimization and security
Modern technical SEO requires content and functionality to remain consistent and usable across devices while maintaining secure delivery.
Review headings, navigation, cards, forms, tables, and long URLs.
Review common 768px and 1024px viewports.
Keep important content, links, metadata, and schema available.
Make controls large enough and properly spaced.
Use a responsive viewport declaration.
Redirect HTTP URLs and maintain a valid certificate.
Update insecure scripts, styles, fonts, images, and embeds.
Evaluate HSTS, CSP, content-type protection, referrer policy, and frame rules.
JavaScript rendering and AI accessibility
Important copy, links, metadata, and structured data should be available as early and reliably as possible.
Confirm main copy, links, metadata, and schema are present before client rendering.
Prioritize key services, products, locations, and informational pages.
Review what remains visible and navigable.
Do not require crawler-triggered interactions to reveal essential copy or links.
Do not require a click, hover, tab expansion, or crawler-specific interaction to reveal essential content or links.
Which issues should you fix first?
Not every technical issue deserves the same urgency. Prioritize based on whether the problem blocks access, indexation, rendering, usability, or machine understanding.
| Priority | Examples | Recommended Response |
|---|---|---|
| Critical | Blocked pages, widespread noindex, 5xx errors, broken migrations | Fix immediately because visibility or access may be broadly compromised. |
| High | Canonical conflicts, redirect chains, severe CWV failures, broken schema | Prioritize in the current sprint or remediation cycle. |
| Medium | Unused assets, oversized images, warnings, weak internal discovery | Address after blocking and high-impact issues are controlled. |
| Ongoing | Crawl monitoring, sitemap hygiene, performance trends, schema checks | Build into recurring technical SEO maintenance. |
A single robots.txt mistake can matter more than hundreds of low-severity warnings. Technical SEO audits should rank issues according to the business and visibility risk they create.