What Is SEO? A Simple Guide to How SEO Works (2026)

SEO stands for search engine optimisation. It is the work of improving your website so that it appears in Google, and increasingly in AI answers, when people search for the products, services or information you offer. When someone in Nairobi searches “plumber near me” or “how much does solar cost in Kenya”, SEO is what decides whether your business shows up or a competitor does.

Unlike ads, you do not pay Google for each visitor from organic search. Instead, you earn your place by having helpful content, a technically sound website and a trusted reputation. This guide explains what SEO is in digital marketing, how SEO works, the main types of SEO, how AI search changes things, and a simple 30-day checklist you can start with today.

What is SEO in digital marketing?

Digital marketing has several channels: search, social media, paid ads, email, content and more. SEO is the part focused on organic search, meaning the unpaid results below the ads. It matters because search captures people at the moment they are looking for something. A person searching “office furniture Nairobi” is already a potential buyer. For a wider view of how SEO fits alongside other channels, read what digital marketing is and how it works.

How SEO works: crawling, indexing and ranking

Google explains that Search works in three stages:

1. Crawling. Google’s automated program, Googlebot, discovers pages by following links and reading sitemaps, then downloads their text, images and videos.
2. Indexing. Google analyses each page to understand what it is about, groups duplicates, picks a main version and stores the information in its index, a huge database.
3. Serving and ranking. When someone searches, Google looks through its index and shows the pages it judges most relevant and useful, taking into account things like the searcher’s location, language and device.

Two important points. First, Google does not accept payment to crawl a site more often or rank it higher in organic results. Second, Google does not guarantee it will crawl, index or show any page. Your job is to make each step easy and give Google good reasons to choose your page.

Keywords and search intent

A keyword is simply the words people type or speak into a search engine. SEO starts with understanding which keywords your customers use and what they want when they use them. That second part is called search intent.

Matching the page to the intent matters as much as the words. If everyone ranking for a search shows price lists, a page of company history will struggle. Look at what already ranks, then make something more useful, more specific to Kenya and easier to act on. Include local details such as prices in KES, delivery areas and payment by M-Pesa.

The main types of SEO

On-page SEO

On-page SEO is about the content and structure of each page:

• Clear page titles and meta descriptions that include what people search for.
• One main heading (H1) and logical subheadings.
• Content that fully answers the searcher’s question, written for people first.
• Descriptive image file names and alt text.
• Internal links between related pages, such as linking a service page to a related guide.

Technical SEO

Technical SEO makes sure search engines can access and understand your site:

• Fast loading on mobile phones, checked with Google PageSpeed Insights.
• Secure HTTPS connection.
• An XML sitemap submitted in Google Search Console.
• No broken links, duplicate pages or important pages blocked from crawling.
• Structured data (schema) that describes your business, products, reviews or FAQs.

Off-page SEO

Off-page SEO is your reputation across the web. Links from respected Kenyan websites, mentions in the press, partner and supplier links, and genuine reviews all signal that your business is trustworthy. Quality matters far more than quantity; bought bulk links can do more harm than good.

Local SEO

Local SEO helps you appear in Google Maps and the local results for searches like “car wash in Roysambu” or “dentist in Kisumu”. The foundation is a complete, verified Google Business Profile with accurate hours, photos, services and steady customer reviews. Our Google Business Profile guide walks you through the setup.

SEO and AI search: what changes?

Google now shows AI Overviews at the top of many results, and offers AI Mode for longer conversations. People also ask AI assistants for recommendations. Optimising to be cited in these answers is often called generative engine optimisation (GEO) or AI search optimisation.

The good news: Google’s guidance says there are no special tricks for its AI features. Your pages need to be crawlable and indexed, and the same principles apply: helpful, original, people-first content, a good page experience, structured data that matches what is on the page, and up-to-date Business Profile information. In practice, clear answers near the top of a page, specific facts, prices in KES and a well-known brand all make your content easier to cite. Learn more in our guide on getting recommended by AI search in Kenya.

A 30-day SEO starter checklist for Kenyan businesses

After 30 days, keep going: one useful page or guide a month, regular Business Profile updates and a monthly look at Search Console will compound over time.

Common SEO mistakes to avoid

• One page for everything. A single “Services” page cannot rank for ten different services.
• Copying content from competitors or supplier websites.
• Keyword stuffing the same phrase into every sentence.
• Slow, heavy websites that frustrate mobile users on data bundles.
• Ignoring Google Business Profile, which often drives more calls than the website for local businesses.
• Buying cheap backlinks or trusting anyone who guarantees number one rankings.
• Redesigning without redirects, which can wipe out rankings built over years.
• Giving up after a month. Google says SEO improvements commonly take four months to a year.

Free SEO tools every business should use

• Google Search Console: shows which searches bring impressions and clicks, which pages are indexed and any problems Google finds.
• Google Business Profile: controls how you appear in Maps and local results, and shows calls and direction requests.
• Google PageSpeed Insights: tests how fast your pages load on mobile and desktop and suggests fixes.
• Google Analytics: shows what visitors do on your site and which channels bring enquiries.
• Google search itself: the “People also ask” box and autocomplete reveal real questions to answer.

Where to go next

Now that you know what SEO is and how it works, our in-depth SEO guide for Kenya covers keyword research, content planning and link building in more detail. If you are budgeting, see SEO pricing in Kenya for typical costs and what each package should include.

Let Sedi Digital help you get found

Sedi Digital is a Nairobi digital marketing agency in Roysambu. Our SEO and AI search visibility service handles technical fixes, content, Google Business Profile management and reporting tied to real enquiries, and our content production team creates the pages and guides that earn rankings. We will not promise overnight results or guaranteed positions, but we will give you a clear plan and honest reporting. Tell us about your business through our project planner or get in touch.