SEO (search engine optimization)

What is SEO?

SEO (search engine optimization) is the practice of improving a website so it appears higher in the unpaid results of search engines such as Google and Bing. It covers the technical health of the site, the content on each page, and the reputation the site earns from links and mentions elsewhere on the web.

Every time someone types a query, a search engine picks a handful of pages from the billions it knows about and orders them on a results page. Getting into that list happens in three stages. First the engine finds your pages by following links (crawling). Then it reads and stores them (indexing). Finally, when someone searches, its ranking algorithm decides which stored pages answer the query best. SEO is the work of making each of those three stages go well for your site.

People usually split SEO into three parts. Technical SEO makes sure search engines can crawl, render and index your pages without trouble: speed, redirects, sitemaps, canonical tags, mobile layout. On-page SEO is about each page itself: the words, the title tag, headings, images and internal links, and whether the page answers what the searcher wanted. Off-page SEO is what happens elsewhere: other sites linking to you (backlinks), reviews, and mentions of your brand.

Underneath all three sits one idea: search intent. Search engines want to show the result that best satisfies the person searching. A page that ranks well is usually the most useful answer to a specific question, from a site the engine has reason to trust. Google describes what it looks for in terms of helpfulness and E-E-A-T: experience, expertise, authoritativeness and trust.

SEO is different from paid search. Ads appear because you pay per click; organic results appear because the engine judged your page relevant. You can’t pay Google to rank higher organically. That makes SEO slower to show results, often months rather than days, but the traffic keeps coming without a cost per click. The two together are often called search engine marketing.

SEO now also reaches beyond the classic ten blue links. Search results include featured snippets, maps, videos and AI Overviews, and AI assistants such as ChatGPT and Perplexity search the web and cite sources. Much of the same work, clear content, a healthy site and a trusted brand, also helps you show up there. That newer field is often called AI visibility or generative engine optimisation.

Why SEO matters

Search is how most people look for information, products and services online. When someone types a question that your business answers, SEO decides whether they find you or a competitor. Visitors from organic search arrive with a need already in mind, which makes them more likely to read, sign up or buy than most other kinds of traffic.

Organic traffic also compounds. A page that ranks keeps bringing visitors month after month without paying for each click, and the links and trust a site builds make the next page easier to rank. Stop paying for ads and the ad traffic stops; a well-ranked page can keep working for years if you keep it accurate and up to date.

Finally, SEO work tends to improve the site for people too. Faster pages, clearer navigation, honest titles and content that answers the question are what search engines reward because they are what users want.

How to start with SEO

1. Make sure Google can see your site. Verify it in Google Search Console, submit an XML sitemap, and check the Page indexing report for pages that are excluded.
2. Fix the technical basics. Run an SEO audit to find broken links, redirect chains, missing titles, slow pages and pages blocked by robots.txt or noindex.
3. Do keyword research. Find the words your audience actually types, how many people search them, how hard they are to rank for, and what intent sits behind each one.
4. Map one main keyword to each page. Give every important topic its own page, so two of your pages don’t compete for the same search.
5. Write and optimise the page. Answer the query better than what already ranks, then write a clear title tag, a meta description, a single H1, descriptive headings and alt text for images.
6. Link your pages together. Use internal links with descriptive anchor text so visitors and crawlers can reach every important page in a few clicks.
7. Earn links and mentions. Publish things worth citing, such as original data, tools and guides, and tell the people who would care. Avoid buying links: it breaks Google’s spam policies.
8. Measure and repeat. Track rankings and clicks over weeks, not days, look for queries where you sit just off page one, and improve those pages first.

SEO example

A bakery in Leeds wants more cake orders. Keyword research shows people search “birthday cakes Leeds” and “custom cake delivery Leeds”. The bakery creates a page for each, with clear photos, prices, delivery areas and a title tag like “Custom Birthday Cakes in Leeds | Delivery Available”. It fixes its slow homepage, adds the shop to Google Business Profile, asks happy customers for reviews and gets listed by a local wedding blog. Over a few months the pages move from page three to the top five and orders from search rise.