SEO can sound complicated because there are hundreds of individual tactics people associate with it.
Keywords. Content. Backlinks. Technical SEO. Google rankings. Internal links. Local SEO. AI search.
But the basic idea behind SEO is actually pretty simple:
SEO helps search engines find, understand, and evaluate your website so your pages have an opportunity to appear when people search for information, products, or services related to your business.
I’ve worked in SEO for more than 20 years, and although search has changed dramatically during that time, the fundamentals still matter.
You need pages search engines can access.
You need content that clearly communicates what those pages are about.
You need to match what people are actually searching for.
And if you want to compete for valuable searches, you need to give search engines good reasons to choose your pages over the alternatives.
Let’s break down how that works.
Quick Answer: How Does SEO Work?
SEO works by improving different parts of your website and online presence so search engines can:
1. Discover your pages
2. Crawl and process them
3. Index eligible pages
4. Understand what they’re about
5. Determine which searches they’re relevant to
6. Evaluate them against other possible results
SEO can involve:
- Search intent
- Keywords
- On-page optimization
- Helpful content
- Technical SEO
- Website structure
- Internal links
- Backlinks
- Local SEO
- User experience
- Authority
- Ongoing analysis and improvement
There isn’t one SEO trick that makes a website rank.
The pieces work together.
How Search Engines Work
Before you can understand SEO, it helps to understand what Google is trying to accomplish.
When someone searches Google, Google’s systems try to return results that are useful and relevant to that particular search.
At a very high level, the process looks something like this:
Discovery → Crawling → Indexing → Ranking
SEO helps your website at each stage.
Let’s start with discovery.
1. Crawling: How Google Finds Your Pages
Before one of your pages can appear in Google Search, Google generally needs to know that it exists.
Google uses automated programs commonly called crawlers to discover pages across the web.
It may discover a URL through:
- Links from other websites
- Internal links on your own website
- XML sitemaps
- Previously discovered URLs
- Other sources Google already knows about
This is one reason website structure matters.
If you publish an important page but bury it deep within your website with no useful internal links pointing toward it, you’ve made that page harder for people—and potentially search engines—to discover.
What About an XML Sitemap?
An XML sitemap gives search engines information about URLs you want them to know about.
I consider it an important technical SEO tool.
But putting a URL in your sitemap does not guarantee that Google will index it.
And indexing doesn’t guarantee rankings.
That’s an important distinction.
2. Indexing: How Google Processes Your Pages
Crawling and indexing aren’t the same thing.
Google can discover a page without necessarily indexing it.
After Google accesses a page, its systems process information from the page and determine how it should be handled.
That can involve information such as:
- Main page content
- Titles
- Headings
- Links
- Images
- Structured data
- Canonical signals
- Similar or duplicate pages
This is where technical SEO problems can cause trouble.
For example, a page might have:
A noindex directive.
An incorrect canonical.
Crawl restrictions.
Duplicate or near-duplicate versions.
Redirect problems.
Other technical issues.
You could write an incredible page, but if search engines can’t properly access or process it, you’ve created an unnecessary obstacle before ranking even enters the conversation.
3. Ranking: How Google Decides What to Show
Once Google has eligible pages in its index, its ranking systems determine which results to show for a particular search.
There isn’t one universal SEO score.
And there isn’t a formula like:
Use your keyword seven times + get five backlinks = position #1.
Search is much more sophisticated than that.
Different searches can require different considerations.
Depending on the query, relevant considerations can include things such as:
- Relevance
- Meaning and intent
- Content quality and usefulness
- Links
- Location
- Freshness when appropriate
- Language
- Usability
- Context
This is why SEO isn’t about finding one “ranking factor.”
It’s about building a website and pages that can compete for the searches that matter to your business.
4. Search Intent: Understand What the Searcher Actually Wants
This is one of the most important SEO concepts I use when planning websites.
Search intent is the reason behind a search.
Consider these four searches:
“What is SEO?”
“SEO pricing”
“SEO company San Diego”
“How long does SEO take?”
They’re all related to SEO.
But the people making those searches probably don’t want the same thing.
Someone searching “What is SEO?” wants information.
Someone searching “SEO pricing” may be evaluating cost.
Someone searching “SEO company San Diego” may be looking for a provider.
Someone searching “How long does SEO take?” wants to understand expectations.
Trying to make one page rank for all four intents usually isn’t the strategy I’d choose.
Instead, I want the appropriate page for each meaningful intent.
That’s why I consider search intent before optimizing important pages.
5. Keywords Still Matter—Just Not the Way They Used To
You’ll sometimes hear:
“Keywords don’t matter anymore.”
I wouldn’t go that far.
Keywords are incredibly useful because they tell us how people describe what they’re looking for.
If I call something one thing but my potential customers consistently search for something else, that’s useful information.
The mistake is thinking SEO means repeating the exact same keyword over and over.
A strong service page should naturally make clear:
What the service is.
Who it’s for.
What problems it solves.
How it works.
What questions customers have.
Where it’s available, when location is relevant.
Related concepts and terminology.
That’s much more useful than trying to reach an arbitrary keyword density.
If you’re building a website around valuable search terms, I recommend starting with how to find your money keywords and then creating a keyword map so those terms have logical destinations on your website.
6. On-Page SEO Helps Search Engines and People Understand a Page
On-page SEO refers to optimization performed directly on your website pages.
That can include:
- Page titles
- Headings
- Page copy
- Search intent
- Keywords
- Internal links
- Images
- Alt text
- Meta descriptions
- Calls to action
- Content updates
But I don’t optimize these elements simply to check boxes.
The goal is clarity.
If I’m optimizing a page for a business, I want a visitor to quickly understand:
Where am I?
What is this page about?
Does this business provide what I need?
Why should I trust the information?
What should I do next?
Good on-page SEO and good usability often complement each other.
7. Technical SEO Makes Sure the Foundation Works
Technical SEO deals with the systems underneath the content.
Depending on the website, that can involve:
Crawling.
Indexing.
Canonical tags.
Redirects.
XML sitemaps.
Robots directives.
HTTPS.
Mobile usability.
Site architecture.
Page performance.
Structured data.
Broken links.
JavaScript rendering.
Duplicate URLs.
I spend a lot of time on technical cleanup because publishing more content won’t necessarily solve an underlying technical problem.
At the same time, technical SEO isn’t magic.
Getting a perfect performance score doesn’t automatically put you at #1.
Adding schema doesn’t guarantee a ranking.
Submitting a sitemap doesn’t guarantee indexing.
Technical SEO helps create a solid foundation so unnecessary problems aren’t holding good pages back.
8. Internal Linking Helps Create Website Structure
Internal links connect one page of your website to another.
They’re one of my favorite SEO tools because you control them.
For example:
Supporting article → important service page
Service page → related service
Educational article → related educational resource
Location-related content → appropriate location page
Internal links can help visitors find the next useful page and help search engines understand relationships between your content.
They can also help establish hierarchy.
If one of your most important service pages is buried within the website with almost no internal links pointing toward it, that’s something I’d investigate.
But I don’t recommend forcing the same exact-match anchor text into every article.
Internal links should be descriptive and useful.
I explain this more fully in my guide to internal links for SEO.
9. Backlinks Can Help Build Authority
A backlink is a link from another website to yours.
Backlinks can help search engines discover content and can contribute to a page or website’s ability to compete in search results, particularly when those links come from relevant and reputable sources.
But backlinks aren’t simply a numbers game.
If an SEO tool tells me:
Competitor A has 500 backlinks.
and:
Competitor B has 1,000 backlinks.
I’m not automatically choosing Competitor B as the stronger site.
I want to know where those links came from.
Legitimate link opportunities can come from:
- Industry publications
- News coverage
- Professional associations
- Business relationships
- Local organizations
- Digital PR
- Original research
- Useful resources
- Expert commentary
Third-party metrics such as Domain Authority can be useful for research and comparison, but they’re not Google’s own ranking scores.
If you’re working on this area, read my guide on how to get other websites to link to yours.
10. Helpful Content Gives Your Website Something Worth Ranking
Content is obviously an important part of SEO.
But there’s an important distinction:
More content isn’t automatically better SEO.
You don’t need to publish three blog posts every week just because someone told you Google likes fresh content.
I’ve seen websites accumulate hundreds of articles that receive almost no meaningful search visibility.
I would rather have a smaller library of useful pages with clear purposes.
For example, an important service page might be supported by articles answering questions about:
Cost.
Benefits.
Risks.
Timelines.
Comparisons.
Eligibility.
Alternatives.
Common problems.
Those articles can serve potential customers while creating deeper coverage around the services the business actually provides.
That’s why I focus on useful topical depth rather than content volume.
I’ve written more about this in Why Publishing More Blogs Doesn’t Improve SEO and my guide to topical authority.
11. Local SEO Adds a Geographic Layer
Local SEO becomes particularly important when a business serves customers in a specific geographic market.
Examples include searches like:
“dentist near me”
“plumber Poway”
“personal injury attorney San Diego”
“gym near me”
Local SEO can involve:
- Google Business Profile
- Google Maps
- Reviews
- Local citations
- Accurate business information
- Location relevance
- Local links and mentions
- Website content
- Service areas
For eligible local businesses, the website and Google Business Profile can complement one another.
But Maps rankings and traditional organic rankings aren’t identical.
A business can perform strongly in one and less strongly in the other.
If your business depends on customers from a defined geographic market, Local SEO deserves specific attention.
I’ve written a separate guide explaining how SEO works for San Diego businesses and a more comprehensive Local SEO guide for San Diego businesses.
12. User Experience Still Matters
SEO isn’t only about search engines.
Eventually, a real person lands on your website.
They need to be able to use it.
I want a website to be:
Easy to navigate.
Mobile-friendly.
Readable.
Secure.
Reasonably fast.
Stable while loading.
Clear about what the business does.
Easy to contact, schedule with or buy from.
Google’s Core Web Vitals can help identify aspects of page experience involving loading performance, responsiveness and visual stability.
But I wouldn’t obsess over one score while ignoring the actual website.
A technically fast page with terrible content isn’t automatically a great search result.
And a beautiful website doesn’t automatically rank well either.
The pieces need to work together.
13. SEO Also Helps Create Topical Clarity
One of the biggest changes I’ve made in the way I approach content is thinking less about isolated keywords and more about the overall structure of a website.
Suppose a business offers hair restoration.
Instead of publishing random health articles, it might build useful resources around subjects directly connected to its expertise:
Hair loss.
Hair transplant procedures.
FUE.
Recovery.
Grafts.
Candidate questions.
Costs.
Before-and-after expectations.
Those relationships can make the website easier for people and search engines to understand.
That’s where internal linking, content strategy, service pages and topical depth start working together.
The goal isn’t to manufacture “topical authority” by publishing hundreds of articles.
The goal is to build a useful body of information around subjects the business genuinely knows.
14. How Does SEO Work With AI Search?
Search in 2026 isn’t limited to Google’s traditional list of blue links.
People can discover businesses and information through:
Google Search.
Google Maps.
AI Overviews.
AI Mode.
ChatGPT.
Gemini.
Other AI-powered discovery experiences.
That doesn’t mean everything we know about SEO suddenly became irrelevant.
The fundamentals remain extremely useful.
I still want:
Useful, original content.
Pages that can be crawled and indexed.
Clear website structure.
Descriptive internal links.
Strong service pages.
Accurate business information.
Legitimate authority.
Clear expertise.
A technically accessible website.
There isn’t one universal “AI SEO formula” that guarantees your business will be recommended by every AI platform.
Different systems work differently.
That’s why my approach to AI search builds upon strong SEO fundamentals rather than treating AI optimization as a bag of tricks.
If you’re specifically interested in this area, read my guide on how to get your business recommended by ChatGPT and AI search.
How Do You Know Whether SEO Is Working?
I don’t measure SEO success using one keyword.
Rankings are useful, but they’re only one part of the picture.
Depending on the business, I may monitor:
Search impressions.
Organic clicks.
Important keyword positions.
Visibility of service pages.
Qualified organic traffic.
Phone calls.
Form submissions.
Appointments.
Sales.
Google Maps visibility.
Backlink growth.
Conversions from organic search.
Google Search Console is particularly valuable because it shows which queries and pages are generating visibility in Google Search.
This lets me identify opportunities such as:
A valuable keyword moving upward.
A page losing visibility.
The wrong URL ranking for a search.
A page sitting around positions 11–20.
A high-impression query receiving very few clicks.
Those are much more actionable than simply asking:
“Did my traffic go up?”
Ultimately, SEO should support business goals.
More traffic isn’t particularly useful if it’s the wrong traffic.
How Long Does SEO Take to Work?
There is no universal SEO timeline.
Some changes can produce relatively quick improvements.
Other SEO campaigns require months of sustained work.
The timeline can depend on:
Competition.
Website history.
Existing authority.
Technical condition.
Content.
Backlinks.
Location.
Industry.
The keywords being targeted.
Available resources.
The strength of competing websites.
This is why I don’t promise that every website will reach #1 within a certain number of months.
Nobody controls Google’s organic results.
If you want a more detailed explanation, read How Long Does It Take to Start Seeing Results With SEO?.
Can You Do SEO Yourself?
Yes.
A business owner can absolutely learn and implement many SEO fundamentals.
You can:
Research keywords.
Improve page titles.
Write useful content.
Strengthen service pages.
Add internal links.
Manage your Google Business Profile.
Monitor Google Search Console.
Improve website organization.
The challenge usually comes as the website, competition and technical complexity increase.
For example:
Why is the wrong page ranking?
Should two articles be consolidated?
Why did rankings suddenly decline?
Is a canonical tag causing a problem?
Why isn’t Google indexing a page?
Should this keyword have its own page?
Why does a competitor outrank us?
Which SEO opportunity should we work on first?
That’s where experience becomes especially valuable.
SEO isn’t just knowing a list of tactics.
It’s knowing which tactic makes sense for the problem in front of you.
How Does SEO Work? The Simple Version
If you remember nothing else from this guide, remember this:
Search engines need to find your pages.
They need to be able to process and index eligible pages.
They need to understand what those pages are about.
Your pages need to match searches people actually make.
And your pages need to compete with the alternatives Google could show instead.
SEO helps improve that entire process.
That means combining:
Useful content.
Strong service pages.
Search intent.
Technical SEO.
Internal linking.
Website structure.
Backlinks.
Local relevance when appropriate.
Authority.
Good user experience.
Ongoing analysis.
I’ve been working in SEO for more than 20 years, and search has changed enormously during that time.
The tools have changed.
Search results have changed.
AI is changing how people discover information.
But I still believe the strongest SEO strategies are built on fundamentals rather than shortcuts.
Need Help With Your SEO?
If your website isn’t getting the search visibility you expected, the first step isn’t necessarily publishing more content or buying more backlinks.
It’s figuring out what’s actually holding the website back.
I work directly with businesses on technical SEO, content, internal linking, Local SEO and search strategy.
If you’d like professional help putting these fundamentals into practice, learn more about working with a San Diego SEO expert or request a free SEO analysis.
GET YOUR FREE SEO ANALYSIS
Call or text: (619) 719-1315
Thanks for reading,
Jen Ruhman
SEO Expert & Founder of Jen Ruhman SEO
Frequently Asked Questions About How SEO Works
What is SEO in simple terms?
SEO, or search engine optimization, is the process of improving your website and online presence so search engines can discover, understand and potentially show your pages when people search for relevant information, products or services.
How does Google find my website?
Google can discover pages through links, internal navigation, XML sitemaps, previously known URLs and other sources. Making important pages easy to reach through crawlable internal links helps search engines and visitors discover them.
What is the difference between crawling and indexing?
Crawling is how search engines discover and access pages. Indexing involves processing information from eligible pages so they can potentially appear in search results. A page can be crawled without necessarily being indexed.
How does Google decide which websites rank first?
Google uses multiple ranking systems and signals rather than one universal ranking score. Which results appear can depend on the query, relevance, meaning, content, links, location, freshness and other considerations.
Do keywords still matter for SEO?
Yes. Keywords help you understand how people search and communicate the subject of a page. The goal isn’t to repeat the same phrase excessively. Use search terminology naturally while creating a page that genuinely satisfies the searcher’s intent.
Do backlinks still matter for SEO?
Backlinks can contribute to discovery and a website’s ability to compete in search results. Relevant, legitimate links generally matter more than accumulating large quantities of low-quality links.
Does blogging help SEO?
Blogging can support SEO when the content answers useful questions, fills meaningful topic gaps and supports the services or subjects your website covers. Publishing articles solely to increase the number of pages on your website isn’t necessarily helpful.
How long does SEO take to work?
There is no fixed timeline. Results depend on competition, the website’s starting point, technical condition, existing authority, content, links, industry, location and the searches you’re targeting.
Does AI search replace traditional SEO?
No. AI-powered search changes how information can be discovered and presented, but many SEO fundamentals remain useful, including crawlability, clear content, website structure, internal links, authority and a strong overall digital presence.
Can I do SEO myself?
Yes. Many SEO fundamentals can be learned and implemented by business owners. More competitive or technically complex websites may benefit from professional help with technical SEO, content strategy, internal linking, Local SEO, authority building and ongoing analysis.