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SEO/AEO/GEO

Technical SEO

Portrait of Lukas Horvath, co-founder of Roelu Studio
Lukas HorvathCo-founder

What is Technical SEO?

Technical SEO is the practice of optimizing the infrastructure of a website so search engines can crawl, render, index, and rank it efficiently. It covers site speed, mobile-friendliness, crawlability, indexability, structured data, canonical tags, sitemaps, and rendering. Unlike on-page SEO (content) or off-page SEO (links), technical SEO is about whether the search engine can even see your site properly in the first place.

Why it matters

You can write the best content on the internet. If Google can't crawl it, render it, or figure out which URL is canonical, none of it ranks. Most enterprise sites we audit have technical debt that quietly caps growth — slow servers, JavaScript that hides content from crawlers, duplicate URLs, broken redirects. Marketing keeps publishing. Traffic flatlines. Nobody connects the two. Technical SEO is the boring layer that makes the exciting work possible. Fix it once, properly, and your content team stops fighting the platform.

How it works

Technical SEO starts with a crawl — using tools like Screaming Frog, Sitebulb, or Ahrefs to see what Google sees. You check Core Web Vitals (load speed, layout stability, interactivity), confirm key pages are indexable, validate the XML sitemap, audit robots.txt, fix redirect chains, and resolve duplicate content with canonical tags. On modern stacks (Next.js, Astro), rendering matters: server-side rendering or static generation beats client-side rendering for crawlability. Then schema markup is added so engines understand entities and relationships across pages. The work is unglamorous but compounding — every fix unlocks pages that were invisible before, and every unlock means more eligible queries.

Related terms

  • Core Web Vitals

    Performance

    Google's three benchmark metrics that measure how fast a page loads, how quickly it responds to clicks, and how stable the layout feels as it renders — used in…

  • Schema Markup

    SEO/AEO/GEO

    Code added to your pages that labels content for search engines — turning plain HTML into structured data that powers rich results, AI answer citations, and…

  • XML Sitemap

    SEO/AEO/GEO

    A machine-readable file that lists every important page on your site, helping search engines find and crawl your content faster and more reliably than they…

  • Robots.txt

    SEO/AEO/GEO

    A small file at the root of your site that tells search engine crawlers which pages they can and can't access — useful for keeping junk pages and crawler traps…

  • Indexing

    SEO/AEO/GEO

    The process search engines use to store and organize web pages so they can show up in results — if your page isn't indexed, it can't rank, and most sites have…

  • Canonical URL

    SEO/AEO/GEO

    A tag that tells search engines which version of a page is the original when duplicates or near-duplicates exist, so ranking signals consolidate on one URL…

  • SEO Audit

    SEO/AEO/GEO

    A structured review of a website's SEO health — covering technical setup, on-page content, backlinks, and rankings — to find what's broken, what's missing, and…

  • Page Speed

    Performance

    How quickly a web page loads and becomes usable for a visitor — measured in seconds and milliseconds, and treated by Google as a confirmed ranking signal…