How Search Engines Work

Before you can optimise a website for search engines, it helps to understand how they actually work.

You will learn how search engines discover information across the web, process it and decide which pages to display when somebody performs a search.

Understanding this process provides the foundation for almost every SEO technique covered later in the course.

Crawling, Indexing and Ranking

Crawling, indexing and ranking are three distinct stages of the search process.

You will learn how search engines use crawlers to discover pages, how those pages are processed and added to their indexes, and how search engines decide which pages should appear for a particular search.

This distinction is important because a page cannot rank if a search engine cannot successfully discover, access or index it.

Understanding Ranking Factors

Search engines consider many different signals when deciding which pages deserve to appear prominently in their results.

You will learn about the major categories of ranking factors, including relevance, content quality, authority, links, usability and technical performance.

Rather than looking for a single SEO formula, you will learn how these different signals work together.

E-E-A-T: Experience, Expertise, Authoritativeness and Trust

Google uses the concepts of Experience, Expertise, Authoritativeness and Trustworthiness when evaluating the quality of search results.

You will learn what E-E-A-T means, where the concept comes from and how businesses can demonstrate genuine experience, expertise and credibility through their websites and wider online presence.

This is particularly important for subjects where users need to be able to trust the information they find.

How Large Language Models (LLMs) Work

AI systems such as ChatGPT have introduced an entirely new way for people to discover and consume information online.

You will learn the basic principles behind Large Language Models, how they process language and how their approach differs from that of a traditional search engine.

You don't need to understand the underlying mathematics. The objective is to understand enough about how these systems work to make sensible optimisation decisions.

How LLMs Discover, Process and Retrieve Information

LLMs can obtain and use information in several different ways.

You will learn the distinction between information learned during model training and information retrieved from external sources, including websites and search indexes.

Understanding this distinction is important when considering how your content might be discovered, interpreted, cited or used within AI-generated answers.

Understanding LLM Visibility and Ranking Factors

Being visible in an AI-generated answer is not necessarily the same as ranking highly in a traditional list of search results.

You will learn about the factors that can influence whether a business, website, product or piece of content is surfaced by an AI system.

We also look at the considerable overlap between good SEO and good AI optimisation. Clear, authoritative and well-structured content benefits both.

Defining a Modern SEO Strategy

SEO is most effective when individual techniques form part of a coherent strategy.

You will learn how content, page optimisation, website structure, technical SEO and authority work together rather than treating them as isolated activities.

A good strategy also requires prioritisation: identifying which changes are likely to make the greatest difference and concentrating your resources accordingly.

Understanding Search Intent, Keywords and Topics

Keywords remain useful, but modern SEO involves understanding much more than individual search phrases.

You will learn how to research what people search for, identify the intent behind those searches and understand the wider topics and questions associated with them.

This allows you to create pages that genuinely answer what people are looking for rather than simply repeating particular keywords.

An Introduction to Page Optimisation

Page optimisation involves making individual pages as clear, relevant and useful as possible.

You will be introduced to the fundamental elements of page optimisation, including page titles, headings, body content, images, internal links and other on-page signals.

These subjects are explored in much greater depth later in the course.

An Introduction to Content Structuring

Individual pages don't exist in isolation. The way pages are organised and connected across a website can have a major influence on SEO.

You will learn the basic principles of website architecture, content hierarchy, topic clusters, content hubs and internal linking.

This provides an introduction to the more detailed content-structuring techniques covered later in the course.

An Introduction to Technical SEO

Technical SEO helps ensure that search engines can efficiently access, process and understand a website.

You will be introduced to concepts such as crawling, XML sitemaps, robots.txt, redirects, page performance, mobile-first indexing and JavaScript.

The objective at this stage is to understand where technical SEO fits into the bigger picture before exploring these subjects individually.

White Hat vs Black Hat Techniques

Not every technique designed to improve search rankings complies with search engine guidelines.

You will learn the difference between sustainable, legitimate SEO practices and manipulative techniques intended to artificially influence rankings.

We also look at why shortcuts can be tempting, how search engines identify manipulation and why techniques that produce short-term gains can create significant long-term problems.

Why Understanding SEO & AI Basics Matters

SEO makes much more sense when you understand what is happening behind the scenes.

Instead of following checklists or making changes simply because somebody says they are "good for SEO", you can understand why a particular technique should work and when it is appropriate to use it.

That becomes even more important as traditional search and AI-powered discovery increasingly overlap.

The fundamental objective remains remarkably consistent: make your website easy to discover, easy to understand, authoritative and genuinely useful.

What You Should Be Able to Do After This Module

By the end of this module, you should understand how search engines and LLMs discover and process information, the principal factors that influence online visibility and how the different disciplines of SEO fit together.

Most importantly, you should have the foundation needed to make informed SEO decisions rather than simply following rules and recommendations without understanding the reasoning behind them.