What Are the Types of SEO? Which Ones Matter Most

There are four main types of SEO: technical SEO (making sure search engines can crawl and index your site), on-page SEO (the content and HTML of each page), off-page SEO (links, mentions and reputation elsewhere) and local SEO (your Google Business Profile and map results). Specialist branches such as ecommerce, international and AI search optimisation build on those four.

Most lists of SEO types stop at definitions. This one also tells you which type to work on first, what each one involves week to week, and how to spot when someone is selling you the wrong kind. It is based on Google’s own documentation, checked in October 2026, and on how we plan SEO work for UK businesses at ProntX.

Key takeaways

• Technical, on-page, off-page and local SEO are not separate products. They are four parts of the same job, and weakness in one limits the others.
• Fix technical problems first: a page Google cannot index cannot rank, however good the content is.
• Local SEO matters most if customers find you on Google Maps. Google says local results are mainly based on relevance, distance and prominence.
• Google states there are no special optimisations needed to appear in AI Overviews or AI Mode. Solid SEO fundamentals are what make a page eligible.
• White hat and black hat describe methods, not types. Buying links for rankings breaks Google’s spam policies.

What are the main types of SEO?

The main types of SEO are technical, on-page, off-page and local. Google describes SEO as helping search engines understand your content and helping people find your site and decide whether to visit it from search. Each type covers a different part of that.

You will also see longer lists that add content SEO, mobile SEO, voice search, image and video SEO. Those are useful labels, but they are mostly on-page or technical work aimed at a specific format.

What is technical SEO?

Technical SEO is the work that lets search engines find, crawl, render and index your pages without obstacles. It is the foundation: if Google cannot index a page, nothing else you do to it counts.

In practice, technical SEO means checking the Pages report in Google Search Console for pages that are excluded, fixing broken redirects and duplicate URLs, keeping an XML sitemap clean, and making sure important content is in the HTML rather than hidden behind scripts. It also covers page experience. Google’s Core Web Vitals guidance sets good scores at a Largest Contentful Paint within 2.5 seconds, an Interaction to Next Paint under 200 milliseconds and a Cumulative Layout Shift under 0.1. Google says these metrics align with what its core ranking systems seek to reward, so treat them as part of a healthy site rather than a magic switch.

Our technical SEO work usually starts with exactly these checks, because they tell you whether the rest of the budget will be wasted.

What is on-page SEO?

On-page SEO is everything on the page itself that helps Google and readers understand what it is about: the title, headings, body copy, internal links, images and structured data. It is the type you have most control over.

The biggest on-page job is matching the page to what the searcher wants. Someone searching “boiler repair” wants a service and a phone number; someone searching “why is my boiler losing pressure” wants an explanation. Write the page for that person. Google’s SEO Starter Guide clears up several old habits: it says Google Search does not use the keywords meta tag, and that the length of content alone does not matter for ranking. Title links matter more than most people realise, because the title link is the headline of your result and helps people decide whether to click.

Planning which page targets which search is a content task as much as an on-page one. Our guide to building an SEO content strategy covers that planning step.

What is off-page SEO?

Off-page SEO is the work done away from your own website to build its reputation, mainly earning links and mentions from other relevant sites. Links remain one of Google’s inputs, but Google also says PageRank is just one of many ranking signals.

Good off-page SEO looks like ordinary marketing: a supplier lists you as a stockist, a trade body links to your member profile, a local paper covers your opening, an industry blog cites your research. Bad off-page SEO looks like a package of 100 links for £50. Google defines link spam as creating links to or from a site primarily to manipulate search rankings, and buying links for that purpose falls under it. A useful test: would you still want that link if it passed no SEO value at all? If yes, it is probably a good one.

What is local SEO and who needs it?

Local SEO is the work that helps a business appear in Google Maps and the local pack for searches with local intent. You need it if customers visit you, or you visit them, within a defined area.

Google’s Business Profile help pages say local results are mainly based on relevance (how well a profile matches the search), distance (how far the business is from the searcher) and prominence (how well known the business is). Prominence includes how many websites link to you and how many reviews you have, and Google says more reviews and positive ratings can help your local ranking. That means local SEO blends all the other types: a complete Business Profile, a fast site with accurate location pages, and real reviews and local links. If you are a plumber in Croydon or a dental practice in Leeds, local SEO is usually where the first enquiries come from. Read more about how we approach local search.

Which specialist types of SEO should you know about?

Specialist types of SEO apply the four core types to a particular kind of site or search. The ones UK businesses ask us about most are below.

1. Ecommerce SEO: category and product pages, faceted navigation, product structured data and handling out-of-stock items. Mostly technical and on-page work at scale.
2. International SEO: serving the right page to the right country or language, usually with hreflang annotations and a clear URL structure. Relevant if you sell outside the UK.
3. B2B SEO: longer buying cycles and smaller search volumes, so content aimed at each decision-maker matters more than traffic totals.
4. AI search optimisation (GEO and AEO): making your content easy for AI Overviews, AI Mode and assistants to understand and cite. Google says there are no additional requirements to appear in AI Overviews or AI Mode beyond being indexed and eligible to show with a snippet, so this is good SEO plus clear, quotable answers and structured data that matches the visible text.
5. Content SEO: researching, writing and updating pages around real questions. Technically part of on-page SEO, but often run as its own workstream.

If AI search is a priority, our page on optimising for AI search explains what we change on a site.

Are white hat and black hat types of SEO?

White hat and black hat are not types of SEO; they describe whether the methods follow search engine rules. White hat SEO works within Google’s guidelines. Black hat SEO tries to manipulate rankings, for example through keyword stuffing, link schemes or scaled content abuse, which Google describes as generating many pages for the primary purpose of manipulating rankings.

Black hat tactics can produce short spikes, but they put your whole domain at risk of a manual action or of being demoted by Google’s spam systems. For a business that depends on search for enquiries, the risk is rarely worth it.

Which type of SEO should you start with?

Start with technical SEO, then on-page, then local or off-page depending on how customers find you. That order follows the dependency chain: indexing first, relevance second, reputation third. Use this decision framework to set priorities for the next three months.

• Are important pages missing from Google? Check the Pages report in Search Console. If key pages are not indexed, put technical SEO first.
• Do you serve a local area? If yes and your Business Profile is incomplete or has few reviews, make local SEO the second priority.
• Do your pages answer the searches you want to rank for? If the Performance report shows impressions but few clicks, or pages ranking for the wrong queries, work on on-page SEO and title links.
• Are you on page two for terms that matter? When pages are indexed and relevant but stuck behind stronger competitors, off-page work to earn links is usually the gap.
• Do you sell online or in several countries? Add ecommerce or international SEO once the basics are stable.
• Do buyers research with AI tools? Make sure key answers are in plain text near the top of pages and that your structured data matches what the page says.

Expect patience. Google’s own guide says some changes take effect in a few hours and others take several months, so judge each change over weeks, not days.

How do the types of SEO work together?

The types of SEO depend on each other, so a plan that does only one usually stalls. Great content on a site Google struggles to crawl is invisible; a perfect technical setup with thin pages has nothing to rank; strong pages with no reputation lose to better-known competitors.

That is why we run SEO at ProntX as one plan covering all four types, with the balance shifting month to month. Early months lean technical and on-page; later months lean towards content and earning links. Our SEO and AI search plans start from £595 a month on a rolling monthly contract, and our guide to what SEO costs in the UK explains how the scope changes the price.

How can you check which types of SEO your site needs?

A short audit across all four types will show where the biggest gap is. You can do a first pass yourself in an afternoon with free tools.

• Search Console Pages report: count indexed versus excluded pages and note the reasons.
• PageSpeed Insights: test your homepage and a key service page on mobile.
• Search your main service plus your town: does your Business Profile appear in the local pack?
• Read your top five pages as a customer: does each one answer its search in the first paragraph?
• Search Console Links report: are the sites linking to you relevant to your trade?
• Search your brand name: are reviews, profiles and directory listings accurate and consistent?

If you would rather have someone else look, ProntX offers a free growth audit recorded as a personal video within two working days, covering each type of SEO and what to fix first. When you are ready to act on it, our team can take on the full plan through our SEO service.