SEORAF / SEO Basics

SEO Basics: How Search Works and Where to Start

SEO (search engine optimization) is the practice of helping search engines find, understand and show your pages, while making them useful to the people searching. It can earn unpaid visibility in search results. It cannot guarantee any specific ranking. Google says it takes no payment for crawling, indexing or ranking.

This hub is the starting map for SEORAF. It explains the ideas behind SEO in plain language, and points to Google’s own documentation for detail. SEORAF is an independent SEO knowledge resource.

Last reviewed: 28 September 2026. Statements about Google and page-experience metrics are checked against Google Search Central, Search Console Help and web.dev, linked in Sources. Each is marked Documented (stated by Google or web.dev), SEORAF view (our explanation or advice), or Unsettled (not confirmed).

What SEO is

SEO covers the work that makes a website easier for search engines to access and understand, and more useful to visitors. Google describes its Search Essentials as three parts: technical requirements, spam policies and key best practices.

SEO is separate from paid search advertising, which is bought per click or impression. This hub covers organic search.

Three ideas keep beginners oriented:

  • Access. A search engine must be able to reach your page.
  • Understanding. The page must make clear what it is about and who it helps.
  • Usefulness. People must find what they came for. Google’s key best practices include helpful, reliable, people-first content.

How search works: crawling, indexing and serving

Google Search works in three stages: it crawls pages it has discovered, indexes what it learns from them, and serves results that are relevant to a search. Not every page makes it through every stage. Documented

SEO Basics SEO Basics
StageWhat happensRead more in Google’s guide
CrawlingGoogle finds URLs through links from known pages or a sitemap you submit. Its crawlers may then visit a page and download its text, images and video.Crawling in Google’s guide
IndexingGoogle analyzes the text, images and video on a page and stores that information in the Google index, a large database.Indexing in Google’s guide
ServingWhen someone searches, Google returns information relevant to that query. Results can vary with factors such as location and device.Serving in Google’s guide

Google says it does not accept payment for crawling, indexing or ranking, and cannot guarantee that a page will be crawled, indexed or served. Meeting every requirement does not change that. Documented Being crawled, being indexed and ranking well are three separate outcomes. SEORAF view

Read Google’s own explanation in How Google Search works.

Why SEO matters

  • It is the route to unpaid discovery. Appearing in Google Search results costs nothing.
  • Useful pages can keep attracting visitors. A page that meets a real need may continue to be found without paying per click, but results are neither guaranteed nor predictable.
  • It rewards clarity. Making a site easy to crawl and understand tends to help visitors too.

SEORAF does not quote a timeline for results. How quickly pages are found and how well they perform depends on the site, the topic and the competition. SEORAF view

The main areas of SEO

Think of SEO as connected areas of work. Each area is summarized briefly here so this page stays a map.

SEO Basics SEO Basics

Technical SEO

Making sure pages can be crawled, rendered and indexed, and that site structure is clear.

Keyword research

Finding the words and questions people actually use, and choosing what to cover.

SEORAF keyword research checklist

Content SEO

Writing and improving pages so they answer the search and read well to people.

AI search

How AI-generated answers relate to classic search, and what is still unsettled.

On-page SEO

Work on the page itself: a clear title and main heading, descriptive link text and image alt text, and words people would use to find the content. Google lists these among its key best practices. Documented

Off-page SEO

Signals from outside your site, most often links from other sites. SEORAF view Google’s spam policies treat buying or selling links for ranking purposes as link spam. Documented Links are best treated as something useful pages earn, and this hub does not claim how much any single signal counts. SEORAF view

Local SEO

Helping a business or service appear for searches tied to a place, such as an area it serves. It matters mainly to organizations with a physical location or a defined service area.

SEORAF view

Search intent

Search intent is the goal behind a query: what the person wants to get done. Matching intent is usually the first question to ask before writing or judging any page. SEORAF view

Four common intent types

  • Informational: the person wants to learn something, such as “what is a sitemap”.
  • Navigational: the person wants a specific site or page.
  • Transactional: the person is ready to act, such as sign up or buy.
  • Commercial investigation: the person is comparing options before deciding.

This four-way split is a common industry framework, not a Google rule. Real queries often blend types, so read the current results for a query to see what kind of page people are being shown. To turn intent into a target list, use the keyword research checklist.

A basic SEO workflow

This is SEORAF’s simple sequence for a new site or page. SEORAF view

  1. Set up measurement. Connect Search Console so you can see how your site appears in Google.
  2. Check access. Confirm important pages can be crawled and indexed.
  3. Choose a topic and its intent. Decide who the page is for and what they want.
  4. Create people-first content. Answer the need clearly, with real experience or sources.
  5. Connect the page. Link it from related pages with descriptive anchor text.
  6. Review and improve. Check impressions and clicks over time, then update what is out of date.
SEO Basics SEO Basics

Essential concepts

Crawler

Software that visits pages to discover and download their content.

Index

Google’s stored database of information about pages it has analyzed.

Search results page (SERP)

The page a search engine returns for a query. Layouts vary by query.

Crawler

Software that visits pages to discover and download their content.

Search intent

The goal behind a query. See above.

Sitemap

A list of pages on your site that you can submit so Google can find them.

Spam policies

Google’s list of spam behaviors, such as link spam and hidden text. Sites that violate them may rank lower or not appear in results at all. See Google’s spam policies.

Impressions

In Search Console, how often someone saw a link to your site on Google.

Clicks

In Search Console, how often someone clicked a link from Google to your site.

Average position

An approximate measure, in Search Console, of where your link appeared relative to other results. The reported value is the topmost position your link held, averaged across impressions, and Google notes the method may change. Google suggests focusing more on impressions and clicks than on position.

Core Web Vitals

Metrics for loading, responsiveness and visual stability. web.dev publishes the current “good” thresholds. See web.dev.

SEO and AI search

What Google documents

Google says AI Overviews and AI Mode surface relevant links to help people find information and explore content. Both may use “query fan-out”, meaning several related searches across subtopics, and AI Overviews are shown only when Google’s systems judge them additive to classic Search. To be eligible as a supporting link, a page must be indexed and eligible to appear in Search with a snippet, and Google lists no additional technical requirements. Documented Details are on Google’s AI features and your website page.

SEORAF’s interpretation

Clear, accurate, well-sourced pages serve readers and are easy for any system to summarize. SEORAF view Covering related subtopics on a hub, as this page does, is consistent with how Google describes fan-out. That is SEORAF’s reading, not a promise of inclusion.

What is unsettled

SEORAF does not claim a formula for being included, and cannot verify how other AI products choose and cite sources. Unsettled

Common beginner mistakes

  • Expecting guarantees. Google says it cannot guarantee that a page will be crawled, indexed or served. Anyone promising a ranking position is guessing.
  • Writing for search engines first. Google’s key best practices center on helpful, reliable, people-first content.
  • Assuming a page is indexed. Check it instead of assuming.
  • Reading average position as a fixed rank. It is an approximate average across impressions and can hide large differences between queries.
  • Skipping measurement. Search Console shows how your site appears in Google, and without it you have less to go on.
  • Chasing rules of thumb. Check claims against Google’s documentation before acting on them.

Beginner learning path

  1. Learn how search works. Read the section above and Google’s how Search works guide.
  2. Learn the rules of the road. Read Search Essentials and Google’s SEO Starter Guide.
  3. Get measurement in place. Learn what impressions, position and clicks mean.
  4. Study one area at a time. Start with technical SEO, then keyword research and content SEO.
  5. Practice on a real site. Apply what you learn and check the results in Search Console.
  6. Follow AI search carefully. Return to Google’s AI features page as the topic evolves.

Frequently asked questions

Where to go next

Ready for depth? Read Google’s SEO Starter Guide, then study one area at a time.

Sources

These are the primary sources behind statements marked Documented. Google’s documentation changes, so re-check a page before relying on a detail. Last checked 28 September 2026.