London Web Factory

Technical SEO: What You Will Learn and Why It Matters

Technical SEO ensures that search engines can efficiently access, crawl, render and index your website. Although technical SEO can initially sound complicated, you don't need to be a web developer to understand the fundamentals. Many of the technical features we cover are already built into modern websites and content management systems. The important thing is understanding what they do, why they matter and how to check that they are working correctly.

Getting Started with Google Search Console

Google Search Console is one of the most important tools available to anyone responsible for SEO.

You will learn how to set up and use Search Console to understand how Google sees your website, monitor indexing and identify potential problems.

We also look at the information Google provides about search performance, pages, sitemaps and other technical aspects of your website.

Creating and Submitting XML Sitemaps

An XML sitemap provides search engines with a structured list of the pages you want them to discover.

You will learn how XML sitemaps work, how they are generated and how to submit them to Google through Search Console.

We also look at what should and shouldn't be included in a sitemap and why submitting one doesn't automatically guarantee that every page will be indexed.

Checking and Managing Robots.txt Files

The robots.txt file provides instructions about which areas of a website search engine crawlers should and shouldn't access.

You will learn how to locate and read a robots.txt file, understand the most important directives and identify common mistakes.

This is particularly important because an incorrectly configured robots.txt file can prevent search engines from accessing important areas of your website.

Maintaining Authority with 301 and 302 Redirects

URLs inevitably change as websites evolve.

You will learn how redirects send users and search engines from an old URL to a new one and understand the difference between common redirect types, particularly 301 and 302 redirects.

We look at how redirects can help preserve the authority accumulated by existing pages and why they are particularly important when rebuilding, restructuring or migrating a website.

Core Web Vitals and Page Experience

The technical performance of a website can affect both usability and search visibility.

You will learn about Google's Core Web Vitals and how they measure important aspects of the user experience, including loading performance, responsiveness and visual stability.

Rather than concentrating purely on achieving perfect scores, we look at what the measurements mean and how to identify performance issues that genuinely affect users.

Auditing Websites with Google Lighthouse

Google Lighthouse provides automated tests for website performance, accessibility, SEO and other technical considerations.

You will learn how to run a Lighthouse audit, interpret the results and identify areas that may require attention.

Most importantly, you will learn to distinguish between useful recommendations and technical warnings that may have little practical impact on your SEO.

Monitoring Website Performance

Technical SEO isn't something you check once and then forget about.

Websites change constantly as new pages, images, scripts and functionality are added.

You will learn how to monitor performance over time and recognise technical changes that could affect search visibility, usability or page speed.

Regular monitoring makes it much easier to identify problems before they develop into larger SEO issues.

How the Document Object Model (DOM) Works

When a browser loads a web page, it converts the underlying HTML into a structured representation called the Document Object Model, or DOM.

You will learn the basic principles of how the DOM works and why the content visible in a browser isn't always identical to the original HTML sent by the server.

Understanding this concept provides an important foundation for understanding JavaScript SEO and how search engines process modern websites.

JavaScript and SEO

Many modern websites use JavaScript to generate or modify content after a page has loaded.

You will learn how this can affect the way search engines discover and process content and why JavaScript-heavy websites sometimes present additional SEO challenges.

You don't need to learn JavaScript programming. The objective is to understand what can go wrong and how to recognise when JavaScript may be affecting SEO.

Mobile-First Indexing

Google predominantly evaluates websites using their mobile versions.

You will learn what mobile-first indexing means and why important content and functionality need to be available to users and search engines on mobile devices.

We also look at the relationship between responsive design, mobile usability and technical SEO.

Managing Crawl Budget

Search engines don't necessarily spend unlimited time crawling every website.

You will learn what crawl budget means, when it matters and how poor website structures, unnecessary URLs and other technical problems can waste search engine crawling resources.

For smaller websites, crawl budget is rarely a major concern. However, understanding the principle becomes increasingly important when working with large websites containing thousands or millions of URLs.

Using the Screaming Frog SEO Spider

Screaming Frog SEO Spider is one of the most widely used technical SEO auditing tools.

You will learn how to crawl a website and analyse important technical and on-page elements across hundreds or thousands of URLs simultaneously.

This makes it possible to identify problems such as broken links, redirects, missing titles, duplicate content, indexing issues and other errors that would be extremely difficult to find manually.

Why Technical SEO Matters

You can create excellent content, optimise every page and build substantial authority, but none of that helps if search engines cannot properly access or understand your website.

Technical SEO provides the foundations that allow everything else to work.

It helps search engines discover your pages, access their content, understand how they are constructed and add them to their indexes.

It also helps identify problems that can quietly undermine SEO. A misplaced directive, broken redirect, JavaScript rendering problem or indexing issue can sometimes prevent an otherwise excellent page from performing at all.

That doesn't mean every website needs constant technical intervention.

Modern websites and content management systems handle many technical SEO requirements automatically. What matters is knowing what should be happening and having the tools and knowledge to check it.

Don't Worry — You Don't Need to Become a Developer

Technical SEO is often the part of SEO that non-technical marketers find most intimidating.

But understanding technical SEO doesn't mean learning how to program or configure web servers.

You need to understand the principles, recognise potential problems and know which tools to use to investigate them. If something ultimately requires a developer to fix, you will be in a much better position to identify the problem and explain what needs to be done.

What You Should Be Able to Do After This Module

By the end of the Technical SEO module, you should understand the fundamental technical requirements that allow search engines to crawl, render and index a website.

You should be able to use tools such as Google Search Console, Google Lighthouse and Screaming Frog to investigate a website, identify common technical SEO problems and understand which issues deserve attention.

Most importantly, you should be able to approach technical SEO with confidence — knowing what to check, why you're checking it and when you need specialist technical help.