What is SEO?
SEO (Search Engine Optimization) is the work that makes a search engine find your pages, understand what they are about and show them to people whose query they answer. The result is organic traffic: visitors from search you do not pay per click for. This lesson covers what SEO actually is, the three stages Search runs through, and where to start on your own site.
Google documents the mechanics in «How Google Search works», and the baseline requirements in the SEO starter guide. What follows is the same thing in plain language, with practice.
Peterson quit on Friday.
Coleman quit on Friday.
You're the entire SEO dept now 🙂
The site needs to rank #1 on Google.
Good luck.
— Management
What is SEO?
Imagine: you opened a store. Great vibe 🔥, amazing products, fair prices. But it's in a dark alley with no sign. Customers? Zero.
A website without SEO is exactly that store in the alley.
SEO (Search Engine Optimization) is the work of making Google find your site, understand its content, and show it to the right people at the right moment.
The result of good SEO is organic traffic — free visitors from search. Every day, 24/7, no ad budget required.
How does a search engine work? Three stages
When a user types a query, Google already knows the answer. Because it went through three mandatory steps beforehand:
Rankings are shaped by hundreds of signals, and a major share of them in 2026 are processed by machine learning systems: RankBrain, BERT, MUM, and quality systems like SpamBrain. The algorithm doesn't just count keyword density — it tries to understand whether the page actually solves the user's task. Sounds scary? Don't worry — we'll break it all down step by step. 😎
Who's behind the search query
Behind every query is a person with a specific goal. Understanding that goal (search intent) is half of SEO. Every query falls into one of four buckets:
| Query type | What the user wants | Example |
|---|---|---|
| 🧭 Navigational | Reach a specific website | "facebook login" |
| 📚 Informational | Learn or understand something | "how to change a tire", "what is EEAT" |
| 🛒 Transactional | Buy, order, sign up, download | "buy iphone 17 online" |
| 📍 Local | Find something nearby | "pizza near me" |
The price of a position: why #1 ≠ #5
The lower the position, the fewer the clicks — that much holds in any dataset. The exact click share per position, though, is not published by Google: industry studies disagree because CTR depends on the query type, the shape of the results page and the brand. Memorising someone else's percentage table is a waste of time.
Knowing your own numbers is not. In Search Console, open the performance report, switch on average position and CTR, and compare your pages with each other. That is your click-through table, and it beats any average. A step-by-step walkthrough is in organic CTR by position and in the CTR lens tool.
The practical conclusion stands: moving from fifth place to first is not "a bit better", it is several times the visits to the same page. That is why SEO fights for the top three rather than for "somewhere on page one".
What SEO is NOT (4 big myths)
| Myth | 2026 reality |
|---|---|
| "It's secret tricks" | No. It's methodical work: content → structure → links → speed → metrics |
| "I'll cram in keyword density" | Hasn't worked since 2013 (Hummingbird), and in the BERT/MUM era it's just a signal of low-quality content |
| "AI Overviews and ChatGPT killed SEO" | Quite the opposite: AI-generated answers cite the pages that already rank. To get into the AI answer you first need to be in the organic top results |
| "Set it and forget it" | SEO is a process, not a one-off. Algorithms shift, competitors refresh content, your pages age. Without ongoing work, traffic slowly bleeds away |
Why does this matter right now?
Google remains the search engine most people use: StatCounter measures its share at above 85–90%, with the rest in single digits. That is an independent counter's estimate rather than Google's own figure, but the order of magnitude is clear: a site invisible in Google is invisible to almost everyone.
In 2024–2026 a new layer joined the picture: AI Overviews, SGE, chat assistants. They didn't kill SEO — they shifted the goal. Now the job is to land in both the regular SERP and the sources cited by AI answers. The fundamentals behind both are the same: relevant content, domain authority, clear structure. We'll dig into all of this in the upcoming lessons.
Head to the task: mark which statements about SEO are true and which are myths. 🎮
Practice: look at your site the way Search does
Theory you never check does not stick. Five steps, a couple of minutes each:
- Search Google for
site:yourdomain.com. What comes back is what Search knows about. Nothing, or suspiciously little, means the problem is crawling or indexing, not your copy. - Connect the site to Search Console — Google explains how in the getting started guide. Without it you are working blind.
- In the page indexing report, look at how many pages are indexed and how many are not. Google states the reason for each.
- In the performance report, find five to ten queries the site already appears for. That is your starting point, not a made-up keyword list.
- Run one page through the page analyzer: title, description, headings and speed.
What to do with each report comes in the next lessons. The terms you will meet on the way live in the glossary: SEO, crawlability, indexability, search intent.
How to tell whether SEO is working
Write down today's numbers so you have something to compare against: indexed pages, impressions and clicks for the last 28 days, average position. Look at the same four numbers in a month.
What counts as movement: pages leaving the "not indexed" bucket, impressions growing, new queries appearing. The position for a single query bounces day to day, so judging by it in the first weeks tells you nothing.
Google promises no timeline, and neither should anyone else. For new pages, think weeks rather than days: they have to be crawled and indexed first. What goes into the decision to show a page is described in the helpful content guidance.
What comes next
The next lesson is how search engines work: crawling, indexing and ranking in detail, this time with the Search Console reports in front of you. Google documents the AI answers in the results separately, under AI features in Search.