Technical SEO: why it has to be done before your website goes live

Many people picture SEO as something you "switch on" once the website is finished. In practice, most of what makes Google understand a site well is decided while it's being built: how the pages are organized, what each one is called, how heavy it is and what it says. That set of decisions is technical SEO.

What technical SEO is, in practice

If content is what you say, technical SEO is how the website says it. It's what makes sure Google can find, read and understand every page — and that visitors can use it without frustration.

What technical SEO covers

Structure and URLs

• One page for each important topic (each service, for example), instead of everything mixed on a single page.
• Short, readable URLs, like /services/landing-page.
• Internal links connecting pages about the same subject.

Titles, descriptions and headings

• A unique title per page, with what people search for and the brand name at the end.
• A short description that makes people want to click.
• A single main heading (H1) per page and subheadings in a logical order.

Speed and mobile

• Images at the right size and in lightweight formats.
• Lean code, with no scripts that serve no purpose.
• A layout designed for phones first.

Signals for Google (and for AI)

• A sitemap with every page and a robots.txt guiding the crawlers.
• A canonical tag on every page, stating its official URL.
• Structured data (schema.org) describing the company, the services, the articles and the frequently asked questions.
• HTTPS and a single version of the site (with or without "www").

Why do it before the website goes live

Because almost everything above is structure. Changing the structure of a site that's already live takes far more work than building it right from the start:

• Changing URLs means redirecting the old ones, or you lose what Google had already indexed.
• Moving a service onto its own page forces you to rewrite content and reorganize the menu.
• A site that's slow because of its foundation usually has to be rebuilt, not "tweaked".
• Every fix takes Google weeks to reprocess.

What technical SEO doesn't solve on its own

It lays the foundation, but it doesn't replace useful content, a well-kept Google Business Profile and a brand presence elsewhere on the internet. For those parts, see the SEO guide for small businesses.

How it works on the websites I build

On every website I deliver, technical SEO and GEO — preparing the site for answers from AIs like ChatGPT — are done before launch. They aren't a separate package: the site goes live ready. For my clients, I also handle maintenance and ongoing SEO after launch.