SEO Fundamentals

Search Engine Optimisation

SEO is the practice of making your content findable, crawlable, and worth ranking. In 2026 that means satisfying both traditional algorithms and the generative AI layer sitting above them. The fundamentals haven't changed much since 2002 — but the context has.

What SEO actually is

Search engine optimisation is the work of earning organic (unpaid) visibility in search results. It's not a trick and it's not a hack. At its core, it's producing content that genuinely answers questions, making sure search engines can access and understand that content, and building enough external credibility that Google thinks your content is worth showing.

That's it. Everything else — keyword density, meta keywords, PageRank sculpting — is either noise or an implementation detail of one of those three things.

The three pillars

1. Technical SEO

Search engines can only rank what they can find and understand. Technical SEO covers: crawlability (robots.txt, internal linking, pagination), indexability (canonical tags, noindex directives), site speed (Core Web Vitals, server response time), structured data (schema.org markup for rich results), and mobile usability.

Technical issues are a floor, not a ceiling. Fix them first — a fast, crawlable site won't rank without good content, but a slow or broken one won't rank even with it. Our meta tag analyser and HTTP viewer can surface some of these issues quickly.

2. Content

Content is the substance of SEO. It's what gets ranked, what gets linked to, and what earns trust over time. Good SEO content:

  • Addresses a specific intent — informational, navigational, or transactional
  • Covers the topic thoroughly without padding
  • Is written by or attributed to someone with genuine knowledge
  • Is kept current — stale content loses rankings
  • Has a clear structure that both users and crawlers can follow

Since Google's Helpful Content updates, the question to ask of every piece is: does this exist to help a reader, or does it exist to rank? The former does better, and the latter gets discounted over time.

3. Links

External links from other websites are still the strongest third-party signal Google uses. A site that many authoritative sources cite is, by definition, more trustworthy than one that no-one links to. Link building covers how to earn them.

Internal links matter too — they distribute PageRank through your own site and tell Google which content you consider most important.

E-E-A-T

Google's quality rater guidelines use a framework called E-E-A-T: Experience, Expertise, Authoritativeness, and Trustworthiness. It describes the qualities of content and sites that Google's algorithms try to reward.

Practically speaking, E-E-A-T means:

  • Attributing content to real authors with verifiable credentials
  • Demonstrating first-hand experience where it matters (product reviews, travel, health)
  • Building external recognition — links, brand mentions, citations in industry sources
  • Being transparent about who runs the site and how to contact them

E-E-A-T is particularly important in "Your Money or Your Life" (YMYL) categories: health, finance, legal, and safety topics where poor information causes real harm.

Generative search and AI Overviews

Google's AI Overviews (formerly Search Generative Experience) synthesise answers from multiple sources and display them above traditional results. For many informational queries, the AI Overview now captures the click that used to go to the top organic result.

This is a real shift. Click-through rates from position 1 are lower than they were three years ago for queries where an AI Overview appears. But the implications aren't that SEO is dead — they're that ranking well and being cited in AI Overviews require the same thing: being the most authoritative, clear, and trustworthy source on a topic.

Sites that get cited in AI Overviews tend to have strong backlink profiles, clear authorship, and content that directly and accurately answers questions. The same signals that have always mattered.

Transactional searches — buying something, booking something — still produce traditional results with clicks. Commercial SEO is not going away. Informational SEO is harder than it was.

What hasn't changed

Some things have been true since this site first went live in 2002:

  • Title tags matter. Write them for users first, algorithms second.
  • Slow pages rank worse than fast ones. Always have.
  • Duplicate content confuses crawlers. Use canonical tags.
  • Quality external links improve rankings. Quantity without quality doesn't.
  • User intent matters more than keyword density.
  • Crawl budget is real — large, thin-content sites get crawled inefficiently.

Most SEO failures come from ignoring these basics, not from missing the latest algorithm update.

Where to start

If you're new to SEO or auditing an existing site, a sensible sequence:

  1. Check that your site is indexable — use Google Search Console and our meta tag analyser
  2. Fix technical issues: speed, mobile usability, broken links
  3. Do keyword research to understand what your audience is searching for
  4. Produce content that genuinely addresses those searches
  5. Build internal links between related content
  6. Earn external links through link building
  7. Measure, iterate, repeat

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