What Is SEO and How Do You Do It? How Google Works, a 7-Step Process, AI Search and the Payback Math (2026)

What is SEO? (Short answer)

SEO (search engine optimization) is all the work that helps a website appear higher and more often in the unpaid (organic) results of search engines like Google and Bing for the queries its audience uses. It comes down to three jobs: letting the search engine find and read your pages (technical), giving the best answer to the query (content), and getting other sites to reference you (authority).

Two limits are worth knowing up front. First, nobody pays Google for organic results, and advertising does not change your organic position; Google states this in its documentation. Second, no one can promise the number one spot. Google warns against SEO providers who guarantee rankings or claim a special relationship with Google.

This guide comes from an SEO program we run from scratch on this site. The search volume table and daily log are in a public repository, and several examples below come from there.

How does Google work? Crawling, indexing, serving

Google takes a page through three stages, and not every page finishes all three. Crawling: Googlebot finds the page through links, sitemaps and known URLs, downloads it and renders JavaScript. Indexing: it analyzes the content, clusters similar pages and picks a canonical page for each cluster. Serving: when someone searches, it returns the indexed pages that are most relevant for their location, language and device.

The value of this split is diagnosis. 'My SEO isn't working' can mean three different problems with entirely different fixes. The URL Inspection tool in Search Console tells you which stage a page is stuck at:

• 'URL is not on Google': Google doesn't know the page yet. The fix is discovery, not content: internal links, a fresh sitemap, an indexing request if needed
• 'Discovered, currently not indexed': Google knows the address but postponed crawling. This usually points to low site authority and few internal links
• 'Crawled, currently not indexed': the page was read but not judged worth indexing. Differentiate it and link to it from strong pages
• Indexed but no impressions: the page doesn't match the query or lacks authority. Check the title, intent and competitors
• Impressions but no clicks: the snippet promises no answer, or the position is too low. Prioritize pages that can move into positions 8 to 20

What are the types of SEO?

SEO divides into a few areas. Tackle them in order rather than all at once: technical problems slow content down, and without content there is nothing worth linking to.

• Technical SEO: crawlability, indexability, speed, mobile, redirects, canonicals, structured data
• On-page SEO: title, description, H1 and subheadings, URL, image alt text, internal links
• Content SEO: which page answers which query, topic clusters, updates
• Off-page SEO: backlinks from other sites, brand mentions, digital PR
• Local SEO: Google Business Profile, reviews and local queries. Often the first job for a single-location business

How do you do SEO? 7 steps

This order wastes the least effort on a new or small site. Each step uses the output of the one before it.

• 1. Set up measurement: connect Search Console and GA4, submit your sitemap, record your starting numbers
• 2. Pick queries with demand: confirm volume in a tool like Keyword Planner and drop topics with none
• 3. Confirm intent on the results page: search the query and note the type of the top 5 to 8 results (guide, tool, product, list). What Google shows is what users want
• 4. Read the top three and list what's missing: worked examples, freshness, official sources, experience. Start writing from that list
• 5. Write the page and tune on-page elements: a direct answer in the first paragraph, question-style subheadings, a unique title and description
• 6. Add internal links: link to the new page from at least two strong pages, and out to related pages. Google finds most new pages through links
• 7. Measure and update: wait a few weeks, read queries and positions in Search Console, strengthen pages with impressions but no clicks. Then move to authority work

How do you choose keywords? Volume and intent examples

The most expensive SEO mistake is writing a great page nobody searches for, and intuition fails here. An example from our own program in Turkey: we targeted the Turkish equivalents of 'CAC calculator', 'LTV calculator' and 'churn rate calculator'. Keyword Planner showed all three at 0-10 monthly searches or no data, while 'what is CAC' drew 320 and 'what is LTV' 210. One table changed the target list.

Volume isn't enough; check intent too. 'LTV' results partly explain loan-to-value rather than customer lifetime value. What you see on page one tells you who is really searching.

Estimate the opportunity as well: Monthly clicks ≈ Monthly volume × CTR. In Ahrefs' aggregated desktop data (December 2025), position one earned a 3.9% CTR on informational queries without an AI Overview and 1.6% on queries with one. A 5,400-search query would bring roughly 86 to 211 clicks a month even at number one. High volume doesn't automatically mean high traffic.

• Informational ('what is roas'): a guide. Often shows an AI Overview, so clicks are lower, but it builds trust
• Tool ('dimensional weight calculator'): a working calculator. An overview can't run the math, so clicks should hold up better
• Transactional ('seo consultant'): a service page. Low volume, high lead value
• Brand and navigational: don't target them; the searcher already has a destination

On-page SEO checklist

Run the same list before every publish. None of these lifts rankings alone, but missing them holds good content back.

• Title: unique, clear, around 60 characters, main query first
• Meta description: 120 to 160 characters stating the answer or your difference. It serves clicks, not rankings
• One H1 and logical subheadings: hierarchy is for readers; Google says heading order doesn't affect Search
• First paragraph: the direct answer. It's the most valuable spot for readers, snippets and AI summaries
• URL: short and readable. Keywords in URLs have very little effect, so don't change live URLs for that reason
• Images: alt text that says what the image shows, compressed files
• Structured data: Article, FAQPage, BreadcrumbList or Product matching visible content

What should you check first in technical SEO?

On small sites, technical SEO usually comes down to a handful of basics. Check these before commissioning a full audit.

If content loads through JavaScript, be careful: Google can render it, but some AI crawlers may not run it, and rendering adds delay even on Google. Server-side or static output (SSG) is the safest route. This site is built with React, yet every page is pre-rendered to HTML.

• robots.txt doesn't block important pages and no page carries an accidental noindex
• The sitemap is current and being read in Search Console. On our site, when the last-read date fell behind, new pages stayed 'not on Google' for days
• One address rule: http/https, www and trailing slash all 301 to one canonical version
• Works on mobile: Google evaluates the mobile version of your site
• Core Web Vitals: LCP up to 2.5 s, INP up to 200 ms, CLS up to 0.1. These are experience targets, not a ranking guarantee
• Multilingual sites: reciprocal hreflang, each version self-canonical
• No broken internal links or redirect chains

What is a backlink, and how do you earn one?

A backlink is a link from another site to yours. Google uses links to discover pages and gauge importance, though PageRank is only one of many signals. One editorial link from a relevant real site beats hundreds of directory links.

Buying or selling links for ranking purposes violates Google's spam policies. Paid sponsorship links need rel='sponsored' or rel='nofollow'. The durable path is to create something worth linking to.

• Tools: embeddable calculators other sites can add to their articles (that's why our tools carry an 'Add to your site' box)
• Templates: spreadsheets people can download without signing up
• Original data: numbers from your own measurement that others can cite
• Guest posts: only on relevant publications, with a genuinely useful piece
• Brand mentions: politely ask for a link where you're mentioned without one

Did AI Overviews kill SEO?

No, but they changed the click math. Ahrefs' study of 300,000 keywords found that position one's desktop CTR on AI Overview queries sat about 58% below its forecast without an overview (December 2025). That's a correlation, and features like featured snippets also affect clicks, but 'number one equals lots of traffic' no longer holds for informational queries.

Google's position is clear: there are no additional requirements to appear in AI Overviews or AI Mode. A page must be indexed and eligible for a snippet, and no new AI text file or special schema is needed. So SEO comes first. This traffic is also reported inside the 'Web' search type in Search Console. Treat files like llms.txt as a low-cost extra for other AI tools, not a Google ranking lever.

Make three practical changes: favor pages with calculations, tools and original data, which summaries can't fully replace; open each section with a self-contained, sourced answer; and measure branded search growth as well as clicks. Our GEO guide has the details.

Which SEO advice is wrong or outdated?

Plenty of guides repeat the same claims without sources. Here's how they compare with Google's own documentation:

• 'You need the meta keywords tag': Google Search doesn't use it
• 'Keep keyword density at 1-2%': no such number exists at Google, and excessive repetition violates spam policies
• 'Posts need at least 2,000 words': Google says there is no magical word count, minimum or maximum
• 'Your domain should contain the keyword': according to Google it has hardly any effect beyond appearing in the URL
• 'E-E-A-T is a ranking factor': Google's answer is 'No, it's not'
• 'Duplicate content gets penalized': it isn't a penalty, though it wastes crawl resources
• 'AI-written content is banned': the outcome matters, not the method. Mass-producing pages with generative AI without adding value is what's banned
• 'SEO is a one-off job': algorithms, rivals and queries change. By early November 2026 Google had already logged two core updates (March, May) and four spam updates that year

How long does SEO take?

There's no single timeline. Google says some changes take effect in a few hours and others take several months, and suggests waiting a few weeks before judging. Site history, competition and how quickly Google finds your page all play a part.

On a new site the first signal is impressions, not clicks. Our order was: pages got indexed, impressions began deep in the results, then low-competition 'what is' queries moved toward the top 20. Average position can drop in this phase because new pages enter low; that isn't a bad sign.

When does SEO pay for itself? A worked example

SEO isn't free: an agency, a consultant or your own time all cost money. Calculate breakeven traffic first. Required monthly visits = Monthly SEO cost / (Conversion rate × Contribution per order).

Example figures: $1,500 a month, 1.5% organic conversion rate, $48 contribution per order. One visit is worth 0.015 × $48 = $0.72, so you need $1,500 / $0.72 = 2,083 visits. At an average 2% CTR, that means ranking across roughly 104,000 monthly searches.

Compare the ad equivalent: at $0.80 per click, 2,083 clicks cost $1,667. So in this example SEO beats ads only after reaching breakeven, and pays nothing in the months before it. If you need cash soon, start with ads and build SEO alongside. In B2B, where one customer is worth far more, much less volume can be enough.

• If your market's total volume is below the target, SEO alone won't do it
• Get contribution per order from the margin calculator and your rate from the conversion calculator
• The CPC you pay on a query in Google Ads is the best proxy for its SEO value

How do you measure SEO?

Rank tracking alone isn't enough. Split Search Console queries into branded and non-branded; on most sites early traffic comes from people who already know you, which creates an illusion of growth. The metric that matters is non-branded clicks and what they contribute to conversions in GA4.

• Search Console › Performance: impressions, clicks, CTR, average position by query and page
• Search Console › Pages: indexed pages and reasons for exclusion
• GA4: Organic Search sessions, conversions, leads and revenue
• Search Console › Links: referring domains
• Rhythm: indexing weekly, queries and positions every 2 to 4 weeks, traffic and conversions monthly

How do you choose an SEO consultant?

Google's own questions are a good start. Ask for past examples, whether they follow Google's guidelines, what results to expect by when, and how they measure success. For an audit, give read-only Search Console access.

Three red flags: a number one guarantee, bundles of backlinks sold by count, and monthly reports that don't explain the work done. There's no such thing as 'priority submit' to Google.