The 10 Main Types of SEO Explained

SEO has a way of becoming more complicated than it needs to be. Start looking into it and you quickly run into terms like on-page SEO, technical SEO, local SEO, off-page SEO, semantic SEO, entity SEO, content SEO, video SEO, AEO and GEO. Then somebody inevitably tells you that one of those is the thing you really need. Another person tells you that backlinks are the answer. Someone else says content is everything. And now, of course, there is AI search, which has added another layer of terminology to an industry that already had plenty of it.

The reality is considerably simpler. SEO is not ten separate tricks, and it isn’t a collection of switches you turn on one at a time. It is a group of related disciplines that all contribute to one larger objective: helping search engines and the people using them understand what your business is, what you know, what you offer, where you operate, and why your website deserves to be found. That distinction matters. I’ve been building websites and working with SEO long enough to watch the terminology change several times. The names change. The technology changes. The way search results are presented changes. What doesn’t change nearly as much is the underlying need for a website to be useful, understandable, technically sound and credible.

So when we talk about the “10 main types of SEO,” I don’t think of them as ten independent strategies. There is plenty of overlap between them. In fact, the overlap is where much of the real value comes from. A well-built website supports technical SEO. Good architecture supports on-page SEO. Strong content supports semantic understanding. Internal linking connects that content together. Local signals reinforce geographic relevance. Outside references contribute authority. And all of it increasingly contributes to how a business is understood not only by Google, but by the broader collection of search and AI systems people now use to find information.

1. On-Page SEO

On-page SEO is the part most people probably think of when they hear the word SEO because it happens directly on the pages of your website. It includes the words you use, the subjects you cover, page titles, headings, URLs, metadata, images, links and the way information is organized. But good on-page SEO has never really been about stuffing keywords into a page. That is the simplified version of SEO that refuses to die. A page needs to communicate something clearly. It needs to establish what the subject is, answer the questions surrounding that subject and give both the visitor and the search engine enough context to understand where the page fits.

Consider a page targeting “Denver web design.” Simply repeating that phrase throughout the page doesn’t tell Google very much. A useful page about Denver web design can explain website strategy, UX, development, WordPress, custom websites, branding, conversion, SEO, local businesses and the decisions that go into building a website that actually works. Those concepts naturally belong together. The page becomes stronger because it demonstrates a subject rather than simply mentioning a keyword. This is also where internal linking becomes important. If one page explains technical SEO and another explains website architecture, and a third discusses the relationship between design and rankings, linking those pages together gives visitors a way to explore the subject while giving search engines additional context about the relationships between the pages. I’ve always considered website architecture and web design part of this larger conversation because the content doesn’t exist in isolation. Where information lives, how it is organized and how easily someone can move through it all affect how useful the site becomes.

2. Technical SEO

Technical SEO is everything underneath the visible content that helps search engines crawl, process and understand a website. It is often the least glamorous part of SEO because a visitor may never know whether a site’s canonical tags are configured correctly or whether a particular JavaScript file is creating a crawling problem. But those details can matter. Technical SEO can include site architecture, XML sitemaps, robots.txt, canonical URLs, redirects, duplicate content, broken links, indexation, structured data, mobile performance, page speed, JavaScript behavior and URL structure. It is the infrastructure that allows the rest of the SEO work to function properly.

This is one of the reasons I don’t see web design, web development and SEO as completely separate services. They can certainly be sold separately, but they affect one another. A beautiful website with a confusing structure can create problems. A technically clean website with terrible content isn’t going to magically become authoritative. And a website that was built without considering search engines from the beginning can be much harder to fix later than one that was structured correctly in the first place. Performance belongs in this conversation as well. Website speed isn’t a magic ranking button, but nobody benefits from a slow website. A page that takes too long to become usable creates friction for visitors and can make the entire site feel poorly constructed. On WordPress sites, even seemingly minor decisions involving plugins, scripts, CSS and caching can have a noticeable effect. My guide to configuring WP Rocket for better site speed gets into some of that practical side of the equation.

3. Content SEO

Content is where SEO stops being primarily technical and starts becoming about what a business actually has to say. Search engines need information to understand and evaluate, but simply producing more information isn’t necessarily the answer. A website with 300 mediocre articles isn’t automatically more authoritative than a website with 50 genuinely useful ones. What matters is whether the content creates meaningful coverage around the subjects that are important to the business.

If a Denver company provides SEO services, for example, it should probably be able to explain more than what its SEO service costs. It can explain local search, technical SEO, internal linking, content strategy, Google Business Profile optimization, indexing, ranking, search intent, website architecture and the relationship between web design and search performance. Those articles aren’t just individual opportunities to rank. Together, they demonstrate knowledge of the subject. That is the idea behind topical authority. You aren’t trying to convince Google that you know one keyword. You’re giving it a much larger body of evidence that your business understands an area of expertise. This is also why I don’t recommend treating a company blog as a content treadmill. Publishing something every Tuesday because the editorial calendar says something needs to be published can produce a lot of content without producing much value. A better question is whether the next article strengthens something you want your business to be known for. In other words, content should have a job.

4. Off-Page SEO

Off-page SEO is the part of SEO that happens away from your own website. The conversation usually starts with backlinks, and for good reason: links are one of the ways the web establishes relationships between websites and information. But reducing off-page SEO to “get as many backlinks as possible” misses the point. A relevant link from a legitimate organization, publication, industry resource or local institution can make sense because there is a genuine reason for that connection to exist. A hundred unrelated links created simply to inflate a link count are a very different thing.

That distinction has become increasingly important as search engines have become better at evaluating context and quality. Authority isn’t something you manufacture by collecting random mentions. It is something that tends to accumulate when a business actually exists in a larger ecosystem of relevant information. That can include legitimate partnerships, professional organizations, industry publications, local organizations, useful resources, earned media, community involvement and content that other people genuinely want to reference. The common thread is that the reference makes sense. So rather than asking only, “How many backlinks do we have?” I think a better question is, “Why would another legitimate website mention this business?” If there is a good answer to that question, you’re probably thinking about off-page SEO the right way.

5. Local SEO

Local SEO is particularly important for businesses that serve a defined geographic market. A web designer in Denver, a contractor in Colorado Springs, a restaurant in Boulder and a real estate company in Cody are all operating in search environments where location changes the answer. Local SEO therefore goes well beyond putting a city name in a page title. Your Google Business Profile, website, reviews, business information, citations, local references, location-specific content and overall online presence all contribute to how a business is understood geographically.

The relationship between the website and Google Business Profile is particularly important. Your website provides the larger body of information about the company. Your business profile provides another significant source of information about who the company is, where it is located and what it does. These shouldn’t be treated as completely separate marketing efforts. There is another reason local SEO deserves its own category: local search results can be extremely dependent on where the search is taking place. Someone searching for a service from one part of Denver may see a somewhat different local landscape than someone searching from another part of the metro area. For businesses competing locally, the goal isn’t simply to say “Denver” more often. The goal is to establish genuine local relevance. That’s the larger thinking behind my Denver SEO services work. Local search is part of a broader search strategy, but it has its own signals and its own competitive environment.

6. E-Commerce SEO

E-commerce SEO is SEO applied to an online store, but the sheer size and complexity of many e-commerce websites creates challenges that aren’t present on a typical service business website. A store may have hundreds or thousands of products, multiple categories, product variations, filters and search pages. Products can go out of stock. Manufacturers may provide identical descriptions to dozens of retailers. Filtering systems can create large numbers of URLs. Important category pages can become thin. And poor navigation can make it difficult for both visitors and search engines to understand which pages are actually important.

That makes architecture especially important for e-commerce. A strong e-commerce SEO strategy considers product pages, category pages, navigation, internal linking, product information, images, structured data and indexation together. The objective isn’t just to get somebody to a product page. It is to make sure the page is relevant to the search, provides useful information and gives the visitor a reason to continue toward a purchase. That last part is easy to overlook. SEO traffic isn’t the end goal for an online store. Sales are. A thousand additional visitors who don’t buy anything aren’t necessarily better than a hundred highly qualified visitors who do.

7. Mobile SEO

Mobile SEO used to feel like a distinct specialty. Today, that distinction is becoming less useful because mobile usability is simply part of building a competent website. People search from phones constantly, but “mobile-friendly” doesn’t merely mean that a website technically shrinks itself down to fit a smaller screen. A website can be responsive and still be miserable to use. Navigation can be awkward. Buttons can be too small. Forms can be frustrating. Popups can take over the screen. Images can be unnecessarily heavy. Content can become difficult to scan.

All of those things affect the actual experience of the person you worked so hard to get onto the website. This is another place where design, development and SEO overlap. Search optimization doesn’t stop when somebody clicks the result. The website still has to do its job once the visitor arrives. That’s why I tend to think of mobile optimization as part of good web design rather than a separate SEO checkbox. Responsive layouts, readable typography, efficient assets, sensible navigation and fast-loading pages are simply part of building a website that works. I’ve explored that relationship in more detail in Design Impacts Rankings, because the old idea that design and SEO are unrelated disciplines doesn’t hold up particularly well.

8. Video SEO

Search isn’t confined to webpages anymore, and it hasn’t been for quite some time. YouTube is a massive search engine in its own right, and people increasingly use video when they want to learn how something works, compare options or understand a complicated subject. Video SEO includes titles, descriptions, transcripts, organization and other signals that help a video get discovered, but once again the fundamental question is whether the content is actually useful.

A business doesn’t need to create a video simply because someone said video is good for SEO. A much better approach is to look at the questions customers are already asking. A detailed article can become a video. A frequently asked question can become a short explanation. A complicated process can be demonstrated visually. A case study can be discussed rather than simply written. That creates another useful relationship between content types. Your website can explain an idea in detail, while your YouTube channel can demonstrate it. The two can support one another rather than competing for the same attention. For a company trying to establish expertise, that broader presence can be valuable because you’re no longer relying on one webpage to communicate everything about the business.

9. Semantic and Entity SEO

This is where modern SEO starts to look very different from the keyword-focused SEO many people still remember. Search engines don’t just need to recognize words. They increasingly need to understand what those words represent and how different concepts relate to one another. A company is an entity. A city is an entity. A service is an entity. A person, organization, product or place can all be entities, and search systems can use the relationships between those entities to build a much richer understanding of the information they encounter.

Imagine someone searches for a company. The search engine isn’t necessarily asking only, “Does this exact phrase appear on the company’s website?” It may also need to understand what the company does, where it operates, what services it provides, who is associated with it, what other websites say about it and how all of those pieces fit together. That is one reason comprehensive content and consistent business information matter. It is also why internal links are more useful than many people realize. When you connect related concepts throughout a website, you’re creating relationships within the site’s own information architecture.

If a website discusses Denver web design, WordPress development, branding, UX, SEO, conversion and website performance, and those subjects are connected naturally, the website provides considerably more context than a page that simply repeats “Denver web design” over and over. In modern SEO, context is becoming increasingly important.

10. AI Search, AEO and GEO

This is the newest piece of the puzzle, although I wouldn’t go so far as to say that AI search has created an entirely separate form of SEO. There are certainly new considerations, and the industry has responded with a growing collection of acronyms: AEO, GEO, AI SEO, generative engine optimization and others. The terminology is still evolving. What is much easier to understand is the underlying problem.

People aren’t always searching by entering a few words into Google and choosing one of ten blue links anymore. They are asking longer questions. They are using AI systems to summarize information. They are asking for comparisons and recommendations. They are looking for an answer rather than necessarily looking for a webpage. That changes the way visibility can work.

If an AI system is going to mention a business, product, organization or expert, it needs to understand what that thing is. It needs context. It needs information that can be evaluated. And ideally, there should be enough independent evidence surrounding that entity that the system has some reason to consider it credible.

That doesn’t mean there is a secret formula for “ranking in AI.” Anyone selling one is probably making the subject sound considerably more certain than it is. What it does mean is that many of the fundamentals we’ve been talking about become even more important. Clear information matters. Strong topical coverage matters. Technical accessibility matters. Internal relationships matter. Reputation matters. Brand recognition matters. Relevant third-party references matter.

In other words, AI search isn’t necessarily making traditional SEO obsolete. It is expanding the number of places where the information built through SEO can potentially be discovered, interpreted and used. That is a much more useful way to think about how search and rankings are changing than chasing every new acronym that appears on LinkedIn.

These Aren’t Ten Separate SEO Strategies

The biggest thing I would take away from this list is that these ten categories aren’t really ten boxes. They overlap constantly. On-page SEO depends on good content. Good content is easier to understand when the website has good architecture. Good architecture is easier for search engines to crawl when the technical foundation is sound. Local SEO depends partly on the website but also on what exists outside the website. Off-page authority can strengthen a site’s credibility, but there needs to be something worth referencing in the first place. Video can reinforce written content. Entity understanding connects the business, its services, its location and its broader online presence. And AI search is increasingly drawing on many of those same signals when attempting to answer questions.

That’s why I don’t think the right question is, “Which type of SEO do I need?” The better question is, “Where are the weaknesses in the system?” If your website isn’t being indexed properly, publishing another 50 blog posts probably isn’t the answer. If your technical foundation is excellent but your website has almost nothing useful to say, another technical audit isn’t going to solve the underlying problem. If your organic visibility is strong but nobody in your local market knows who you are, local authority may need more attention. If you’re getting traffic but not enquiries, the problem may have more to do with the website and conversion experience than rankings.

SEO becomes much more useful when you stop treating it as a bag of tactics and start looking at the entire system.

The Real Goal of SEO

I’ve never thought the ultimate goal of SEO was simply to rank for keywords. Rankings are a measurement. Traffic is a measurement. Impressions and clicks are measurements. They’re useful, but they’re not the reason a business invests in a website.

The real objective is to become visible when someone is looking for what you actually provide. Sometimes that means appearing in an organic Google result. Sometimes it means appearing in the local results. Sometimes it means somebody finding an article, reading it and then visiting a service page. Sometimes it means watching a video. Increasingly, it may mean a company being mentioned inside an AI-generated response. The common thread is relevance.

Your website should make it easy to understand who you are, what you do, where you operate, what you know and why someone should trust you. The more effectively you communicate those things, the more opportunities you create for search systems to connect your business with the right questions. That’s why SEO shouldn’t be something that gets sprinkled onto a finished website after everything else has been completed. Search should influence the architecture, content, development and ongoing growth of the site from the beginning.

And that is ultimately where the ten types of SEO come together. They aren’t ten different ways to trick a search engine. They are different parts of the larger job of making a business understandable and discoverable on the web.

Build the foundation correctly. Organize the information well. Create something useful. Establish credibility. Make the business easy to understand. Connect the pieces. Keep improving it.

That’s what modern SEO really is.