Technical SEO is not dead, its priorities have just changed

Declaring technical SEO dead has become a rhetorical reflex. The reality is simpler: the fundamentals still matter, but they are no longer sufficient alone - and some priorities have shifted. What was at the top of the list five years ago is not necessarily there now, and issues that did not yet exist (AI crawler compatibility, signal management for generative engines) have become serious topics.

What remains non-negotiable

Three categories of technical problems remain blocking, regardless of content quality or brand strength. Neglecting them means building on unstable foundations.

Core Web Vitals and load performance

LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift) and INP (Interaction to Next Paint, which replaced FID since March 2024) are confirmed ranking factors. On mobile, performance gaps between sites remain significant and directly impact positions. A slow site will not be systematically penalised in SERPs, but a fast site with equivalent content will gain the advantage. Targets: LCP below 2.5s, INP below 200ms, CLS below 0.1.

Indexability - still the silent prerequisite

A page that cannot be crawled or indexed is a page that does not exist for Google. The most frequent indexability errors are not technically complex - they are noindex directives left in production after a migration, misconfigured canonicals after a redesign, or pages blocked in robots.txt by mistake. These problems generate no visible alert and are only discovered when actively sought, which is exactly why they persist.

• Load speed and Core Web Vitals
• Clean indexability, without crawl traps
• Consistent data structure (schema.org, logical internal linking)

What has changed priority

Two issues have gained importance and remain under-invested on the majority of sites: AI crawler compatibility and JavaScript rendering management on large sites.

AI crawler compatibility

GPTBot, ClaudeBot, PerplexityBot, Google-Extended - crawlers from generative engines behave differently from Googlebot. Some do not render JavaScript. Some respect robots.txt, others do not depending on their configuration. Since 2024, the llms.txt file (an emerging convention, not an official standard) allows sites to indicate to LLMs what they can use and how. It is not mandatory - but it is a maturity signal for a site that wants to be properly referenced in generative answers. The question is no longer only "can Google crawl my page?" but "are the right pieces of information accessible to the right crawlers?".

Revised crawl budget

On high page-volume sites, crawl budget management becomes critical when low-value content (filtered pages, non-canonicalised pagination pages, indexed UTM parameters) consumes crawl resources at the expense of strategic pages. This is not a new topic, but it is growing in importance with the scale-up of e-commerce sites and CMS that automatically generate page variants.

The mistake to avoid

Treating technical SEO as a one-off project - a redesign, an audit, a fix - then moving on. Technical problems recreate themselves: developers add features, CMS evolve, pages multiply. Without regular review (at minimum quarterly on key indicators: index coverage, Core Web Vitals, sitemap coverage, crawl errors), silent regressions accumulate.

Ideal technical SEO is integrated into the development process, not applied after. A technical SEO pre-deploy checklist - checking canonicals, redirects, noindex tags - takes a few hours to set up and avoids corrections taking several days after a failed release.

Technical SEO has not lost importance. It has lost exclusivity: it is no longer the only lever that counts, but it remains the prerequisite without which other levers do not work correctly.