How SEO works, in plain English

What SEO actually means

SEO stands for search engine optimisation. It covers everything that helps your website appear in the unpaid results on Google and other search engines when people search for what you offer.

Those unpaid results are often called organic results, to separate them from the ads that appear above and below them. You cannot pay Google to rank higher organically. You earn it by being relevant, useful and trusted.

How search engines work: crawl, index, rank

Every search engine follows the same three broad steps.

1. Crawl. Automated programs, often called bots or spiders, follow links around the web and discover pages, including yours.
2. Index. The search engine reads each page and stores what it is about in an enormous library, called the index. Pages that are not in the index cannot appear in results.
3. Rank. When someone searches, the search engine pulls the most relevant pages from its index and orders them, using many signals about relevance, quality and trust.

Most SEO problems happen at one of these steps. A page might not be crawled because nothing links to it, might not be indexed because of a technical setting, or might be indexed but rank poorly because it is not the best answer.

The three pillars of SEO

Almost every piece of SEO work falls under one of three headings. Strong rankings come from getting all three right, because each one supports the others.

1. Technical: can search engines read your site?

This is the foundation. Your site needs to load quickly, work well on mobile, have a clear structure and let search engines crawl and index the pages that matter. Problems here are often invisible to visitors but can hold back everything else. Our technical SEO page explains what a technical audit covers.

2. Content: are you the best answer?

Each page should match what people are searching for and answer it better than anyone else. That means using the words your customers use, covering the questions they ask and making the page easy to read. Good content is written for people first, with search engines in mind.

3. Authority: do others vouch for you?

Search engines look at what the rest of the web says about you. Links from relevant, respected websites, reviews and mentions all signal that you can be trusted. Authority takes the longest to build, and it is the hardest for competitors to copy.

What Google looks for in a page

Nobody outside Google knows every ranking signal, and Google changes its systems regularly. But the principles have stayed consistent for years:

• Relevance. Does the page match what the searcher wants? Someone searching "emergency electrician" wants a phone number fast, not a history of electricity.
• Helpfulness. Does the page actually answer the question, with real detail and experience?
• Trust. Is it clear who is behind the page, and is there evidence they know their stuff, such as reviews, credentials and examples?
• Experience. Does the page load quickly, work on a phone and avoid intrusive pop-ups?
• Freshness. For some topics, recent and up-to-date information matters.

Keywords: matching how people search

A keyword is simply the words someone types into a search engine. Keyword research is the work of finding out which words your customers use, how often they search for them and how hard it will be to rank.

The trick is to think in terms of intent rather than individual words. "Logo design" might be someone looking for inspiration, a tutorial or a designer to hire. "Logo designer for a small business" is much clearer, and much more likely to turn into an enquiry.

• Give each main service its own page, focused on one main topic
• Use the words your customers use, even if your industry has its own terms
• Answer the questions people ask before they buy
• Avoid several pages competing for the same search

Local SEO: showing up nearby

If you serve customers in a particular area, local SEO matters most. When someone searches for a service near them, Google usually shows a map with a few businesses before the regular results.

Getting into that map depends on your Google Business Profile, your reviews, consistent business details across the web and how relevant and prominent your business looks in the area. See our local SEO page for the detail.

SEO and AI search

More people now get answers from AI tools and AI-generated summaries at the top of search results. These tools draw on the same web that search engines index, so good SEO is still the foundation.

AI tools also lean heavily on clear, quotable answers, consistent information about your business across the web and what other sources say about you. Making your business easy for them to understand is often called AI SEO, or GEO.

How long SEO takes

SEO builds over months rather than days. Technical fixes and improvements to existing pages can show early movement. New content and authority take longer, and results tend to compound over time.

How quickly you see results depends on your starting point, your competition and how much work goes in. Be wary of anyone who promises a specific ranking by a specific date. Nobody controls Google.

What you can do yourself

• Set up Google Search Console and check which pages are indexed
• Complete your Google Business Profile and ask happy customers for reviews
• Give each service its own page with a clear, descriptive heading
• Write a unique title and description for each important page
• Answer the questions customers ask you on the phone
• Compress images and remove plugins you no longer use

What to expect from an SEO agency

A good SEO agency starts with an audit and research, then gives you a prioritised plan with quick wins first. They should explain what they are doing in plain English, report regularly on visibility, traffic and enquiries, and tell you honestly what SEO can and cannot do.

Be cautious of guaranteed rankings, secret techniques, large numbers of cheap links or reports full of jargon with no mention of enquiries. You can read how we approach it on our SEO services page.