What is SEO? A plain guide for UK businesses

SEO stands for search engine optimisation. In practice it means making it easy for Google to find your pages, understand what you do and where, and decide your business is a good answer when someone searches. This guide explains how that works, using Google's own documentation, and what the work involves for a UK business.

How Google finds and ranks pages

Google describes 3 stages.

1. Crawling. Google's crawler, Googlebot, follows links and downloads the text, images and videos on pages it finds.
2. Indexing. Google reads each page and stores what it learns in its index. Where several pages are near-duplicates, it picks one as the main (canonical) version.
3. Serving. When someone searches, Google looks through its index and shows the pages it judges most relevant and useful for that search, taking into account things such as the searcher's location and language.

Google is direct about 2 points. It doesn't guarantee that it will crawl, index or show any page, even one that follows all its guidelines. And it doesn't accept payment to crawl a site more often or rank it higher. Ads are sold separately and are labelled as sponsored.

What SEO work covers

For most businesses the work falls into 4 parts.

• Technical health. Can Google reach and index every important page? Does the site load quickly on a phone? Are there broken links, redirect chains or pages accidentally hidden from search? Google's Core Web Vitals give 3 measures of how a page feels to use: main content showing within 2.5 seconds, responding to taps within 200 milliseconds, and layout that doesn't jump around while it loads.
• Pages that match searches. People search for a service and often a place: boiler repair in Reading, employment solicitor in Guildford. If you don't have a page that clearly covers a service, Google has nothing of yours to show for it. Each page needs its own title. Google recommends titles that are descriptive and concise, unique to the page, and free of repeated keywords.
• Local presence. For anyone serving customers nearby, the Google Business Profile drives the map results. Google says local ranking depends mainly on relevance, distance and prominence. Our local SEO guide covers this in detail.
• Reputation. Google's local ranking help says prominence includes links to your business and your review count and rating. Being mentioned and linked by real organisations, such as a trade body, a supplier or local press, tells Google that other people vouch for you.

What Google says it rewards

Google's guidance on helpful content asks site owners to write primarily for people, and gives questions to test against. Would someone who came straight to your site find the page useful? Does it show first-hand experience? Will a reader leave with what they needed?

It also suggests asking who made the content, how and why. For a business, the "who" is easy to show: your name, your qualifications, your memberships and photos of real work. The "why" Google cares most about is that the page exists to help people, with ranking as a side effect.

Google lists warning signs of content made mainly for search engines. They include producing large amounts of content on many topics in the hope some of it ranks, summarising what others have written without adding anything, and writing to a word count. Google says it has no preferred word count.

What to avoid

Google's spam policies list the practices it acts against. The ones we see most often with small and mid-sized businesses:

• Doorway pages. Many near-identical pages aimed at slightly different searches, such as the same text repeated for 40 towns with the town name swapped.
• Scaled content. Pages produced in bulk, by any method including AI tools, mainly to rank rather than to help a reader.
• Link spam. Buying or swapping links to influence ranking. Paid links are allowed only when they're marked as sponsored or nofollow.
• Keyword stuffing. Repeating search phrases, town names or phone numbers unnaturally.

Google says sites that break these policies may rank lower or not appear at all. It finds them through automated systems and human reviewers, and a manual action is reported to you in Search Console.

How SEO connects to AI search

Google's documentation on AI Overviews and AI Mode says there are no additional requirements to appear in them. A page needs to be indexed and eligible to show in Search with a snippet, and the usual SEO practices apply. Google also says you don't need special AI files or new markup, and that clicks from AI features are counted in Search Console's Performance report.

Other AI tools, such as ChatGPT, use their own search systems, but they rely on many of the same signals: clear pages, accurate business details and a reputation other sites confirm. Our guide to how AI search chooses businesses covers the differences.

How long it takes

Technical fixes and profile corrections can show within weeks once Google recrawls the pages. New pages and a growing review count usually take months to make a clear difference, and competitive searches take longer. Results also move with things outside your control, such as competitors' work and Google's own updates.

That's why measurement matters more than promises. Set up Google Search Console, note where you start, and compare month by month.

How to judge an SEO provider

Questions worth asking anyone you're thinking of hiring, including us:

• Do they guarantee rankings? Google says it doesn't sell rankings and doesn't guarantee them. A guarantee is a reason to walk away.
• Whose accounts are used? Your Search Console, analytics, Business Profile and domain should be in your name, with the agency added as a user you can remove.
• Where do the links come from? Ask how they earn links. "We have a network" usually means bought links.
• What do they report? Clicks and enquiries from your own data are worth more than a ranking screenshot for a phrase nobody searches.
• Do you approve changes? Nothing should go live on your site or profile without you seeing it.

Next steps

Start with the basics you control: set up Search Console, check your Google Business Profile, and make sure each main service has its own clear page. If you'd like a second pair of eyes, ask us for a free SEO check, or see what an SEO audit covers.