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Home / Guides & Tools / Technical SEO Essentials
Intermediate guide

Technical SEO Essentials

The technical fundamentals that quietly cap your rankings if they're broken — explained without needing a developer background to follow.

Crawlability

If Googlebot can't reach a page — blocked by robots.txt, orphaned with no internal links, or stuck behind JavaScript it can't render — it effectively doesn't exist for search, no matter how good the content is.

Indexation

Being crawlable isn't the same as being indexed. Check Search Console's Page Indexing report for pages marked "Discovered — not indexed" or "Crawled — not indexed" — both mean Google saw the page and chose not to rank it.

Core Web Vitals

Google measures loading speed (LCP), interactivity (INP) and visual stability (CLS) as ranking signals. Slow, janky pages get a real ranking penalty, not just a worse user experience.

Structured data

Schema markup doesn't directly boost rankings, but it unlocks rich results — star ratings, FAQ dropdowns, breadcrumbs — that improve click-through rate from the results you already have.

Want us to action this on your site?

Our Local SEO service covers exactly this, built around your own audit findings.

FAQ

Frequently asked questions

What's the difference between LCP, INP and CLS?

The three Core Web Vitals: LCP measures how fast the main content loads, INP measures how quickly the page responds to interaction, CLS measures whether elements jump around unexpectedly as the page loads.

How do I check my own Core Web Vitals?

Google Search Console's Core Web Vitals report shows real user data for your site for free, or our own audit tool gives an approximate speed reading in seconds.

Does using WordPress/Shopify/Wix hurt technical SEO?

Platform choice matters less than configuration — any of them can be built well or badly. Heavy, poorly-coded themes and plugin bloat are the more common actual cause of technical problems, not the platform itself.

What is a canonical tag and do I need one on every page?

A tag telling Google which version of a page is the "real" one when duplicates exist (with/without query parameters, for example). Worth having on every page, even pointing to itself, as a safety default.

Can too many redirects slow down my site?

Yes — each redirect hop adds latency before the browser reaches the final page. A chain of 3+ redirects on a single link is worth flattening to a single direct redirect.

What's render-blocking JavaScript?

Scripts loaded in a way that stops the browser from displaying the page until they've finished running — adding async or defer attributes lets the page render while the script loads in the background.

How important is mobile-friendliness for technical SEO?

Very — Google uses mobile-first indexing, meaning it primarily evaluates the mobile version of your site for ranking, even for desktop searches.

Do technical SEO issues affect AI crawler access too?

Some do (a slow or broken site is hard for anyone to read), but AI-crawler-specific issues — robots.txt blocking GPTBot, missing llms.txt — are a distinct check, covered in our GEO/AIO service.