What Is SEO? How Search Works Now, Explained for Nonprofits and Small Teams

What is SEO? Search engine optimization is the work of helping search engines find your pages, understand them and show them to the people looking for what you offer. Google’s own SEO Starter Guide puts it in similar terms: helping search engines understand your content, and helping people decide whether to visit.

That definition still holds, and results now show up in more places. A member searching for your conference may now read an AI Overview, ask Google’s AI Mode a follow-up, or type the question into ChatGPT or Microsoft Copilot. This piece answers what is SEO for how search works now: crawling, indexing and ranking, the three parts of SEO, how AI answers choose sources, local search, structured data, measurement and limits. It ends with a starter checklist.

The short version: the answer to what is SEO has barely changed. The basics that worked for the blue links are the basics Google says its AI features rely on. Make pages that search engines can reach and read. Write pages that answer real questions from people who know the subject. Earn mentions and links honestly. Then measure in Search Console and your analytics, and be patient. Anyone who guarantees a ranking or an AI citation is selling something Google, OpenAI and Microsoft do not offer.

What is SEO, in plain terms

Think of SEO as making your site easy to find and easy to trust. Before anyone sees your page, a search engine has to find it, store it and judge it a good match for a question.

SEO is everything you do to help with those three steps. Some of it is technical, like making sure the page loads and is not blocked. Some of it is writing, like using the words your members actually use. Some of it happens off your site, when other organizations link to you.

For a small nonprofit or association, the payoff is practical: people find the membership page, the event registration, the policy brief or the donation form without you paying for each visit. That is why the question of what is SEO matters to an executive director as much as to a developer.

SEO is not paid search. Ads in Google are a separate product with a separate auction. Google states that it "doesn’t accept payment to crawl a site more frequently, or rank it higher." Our post on ads in AI Overviews covers the paid side.

How search engines crawl, index and rank pages

Google’s in-depth guide to how Search works describes three stages. Other search engines work in a similar way.

Crawling. Automated programs called crawlers download text, images and videos from pages. Google’s crawler is Googlebot. It finds new pages mostly by following links from pages it already knows. You can also hand it a list of your pages in a sitemap.

Indexing. After a page is crawled, Google tries to work out what it is about and stores that in its index, a very large database. When several pages look alike, Google groups them and picks one as the canonical, the version it may show in results. Not every page gets indexed.

Serving. When someone searches, Google looks through the index for matching pages and returns the ones it judges most relevant. The searcher’s location, language and device change what they see.

Google’s public ranking results page names the main signals: meaning, relevance, quality, usability and context. On quality, it says one factor is whether other prominent websites link to or refer to the content. On usability, it says that when other signals are about equal, content that people find more accessible may do better.

None of this is guaranteed. Google says meeting its requirements makes a page eligible, with no promise of a crawl, indexing or a spot on page one.

What is SEO when an AI writes the answer?

Classic results are a list of links. AI answers are a written response with links to sources. Both now sit on the same search pages, and both draw on the open web.

Google’s page on AI features and your website says AI Overviews help people get the gist of a topic quickly and link to sources. It describes AI Mode as most helpful for questions that need more exploration, reasoning or comparison. Both may use "query fan-out," which runs several related searches on subtopics to build one answer.

ChatGPT search and Microsoft Copilot work outside Google. OpenAI says ChatGPT rewrites a question into one or more searches and sometimes sends them to partner search providers. Microsoft reports Copilot citations to site owners through Bing Webmaster Tools.

You do not need a second strategy for each of these. Google says its AI features are rooted in its core ranking and quality systems. A page that is indexed, clear and trustworthy is the starting point everywhere. We compared the vocabulary in our explainer on what answer engine optimization is, and the honest summary is that most of it is SEO.

The three parts of SEO

Ask an agency what is SEO and most will split it into three parts. The labels vary, but the work does not.

Each part depends on the others. Good writing on a page Googlebot cannot reach earns nothing, and a fast page with thin content does not rank either.

Technical SEO: can search engines reach and read the page?

On a real site, the first answer to what is SEO is often technical. Google’s technical requirements are short. Googlebot is not blocked. The page works and is not an error page. The page has indexable content. Google says most sites meet these without realizing it.

Common problems on nonprofit and association sites are ordinary ones:

• Accidental blocks. A staging site’s “noindex” setting carried over to production, or a robots.txt rule that blocks a whole folder.
• Pages hidden behind logins. Googlebot cannot log in, so member-only content cannot rank. Public summaries of it can.
• Duplicate pages. The same event under three URLs, or print versions with no canonical tag.
• Content loaded only by JavaScript. Google can render it, but that adds a step that can fail.
• Slow, heavy pages on phones. Large images and too many scripts.

AI crawlers add one more check. OpenAI and other AI companies use their own crawlers, and some firewalls and CDNs block them by default. Our AI crawler access audit walks through how to see who you are blocking. For the deeper list, see our guides to technical SEO foundations and Core Web Vitals.

On-page content: helpful, people-first pages

This is the part most organizations can improve without a developer. Google’s guide to helpful, reliable, people-first content asks whether content is made mainly to help people or mainly to attract search visits. It treats the second as a warning sign.

The SEO Starter Guide adds practical rules, and several of them retire old habits:

• Google Search does not use the keywords meta tag.
• Keyword stuffing is against Google’s spam policies.
• Content length alone does not matter for ranking.
• Keywords in a domain name or URL have hardly any effect on ranking.

What does help is plain. Use the words people search with, in the title, the main heading and link text. Give each page a unique, accurate title and a short description of what it covers. Describe images with alt text. Link related pages to each other with clear anchor text.

For an association, the best pages are often the ones only you can write: what your standards say, how your certification works, what your members found in a survey. Google’s guide on optimizing for its AI features makes the same point. It asks for unique, non-commodity content and warns that mass-producing pages for query variations breaks its scaled content abuse policy. Our on-page SEO checklist covers titles, headings and descriptions in detail.

E-E-A-T, as Google describes it

E-E-A-T stands for experience, expertise, authoritativeness and trustworthiness. Google uses it in its guidelines for search quality raters, the people who review sample results to check whether Google’s systems are working. Google says rater feedback does not directly change rankings.

Two lines from Google’s helpful content page clear up most of the confusion. "E-E-A-T itself isn’t a specific ranking factor." And: "Of these aspects, trust is most important." Google’s systems look for a mix of signals that line up with these qualities. There is no E-E-A-T score to raise.

Google frames the practical side as three questions:

• Who made the content? Use real bylines that link to real author pages.
• How was it made? Explain your method where readers would expect it, including any use of AI or automation.
• Why was it made? Google calls this perhaps the most important question. The answer should be: to help people.

Nonprofits and associations have staff experts, member practitioners and published research. Put their names and credentials on the work. Google has started warning about invented authors, which we covered in our post on the Google fake author warning.

Off-page SEO: links and mentions you earn

Links still matter. Google’s ranking page says one quality factor is whether other prominent sites link to or refer to your content. Links are also how crawlers find new pages in the first place.

The rules are just as clear on the other side. Google’s spam policies define link spam as creating links mainly to manipulate rankings. That covers buying or selling links for ranking, heavy link swaps and automated link building. Paid links are fine when they carry a rel="sponsored" or rel="nofollow" attribute.

Good off-page work for a small organization looks like normal outreach:

• Partner organizations, chapters and affiliates linking to your resources.
• Universities, agencies or journals citing your research.
• Local press covering your events.
• Accurate listings in the directories your field actually uses.

Google’s guide for AI features also says chasing inauthentic mentions across the web is less helpful than it might seem. Keep that in mind when someone pitches an "AI visibility" mention campaign. If a spam update ever hits a site you manage, our explainer on what a Google spam update is explains how they work.

Local SEO and your Google Business Profile

If people visit your office, attend events at your building or look for you by city, local search matters. The results with a map come largely from Google Business Profile.

Google’s help page on improving local ranking names three main factors:

• Relevance: how well the profile matches the search.
• Distance: how far the organization is from the searcher.
• Prominence: how well known the organization is, online and off.

Google’s tips are basic. Fill in the address if people can visit, plus hours, special hours, category and attributes. Verify the profile. Keep details current, since wrong information can keep the profile out of results. Reply to reviews. Add photos.

Google also says there is no way to request or pay for a better local ranking. Ignore offers that suggest otherwise.

For associations without a public office, event and chapter pages may matter more than a profile. A chapter with its own location may fit local search better than the national office.

Structured data helps, but it is not required

Structured data is code in a standard format, usually JSON-LD, that labels what a page contains: an event with a date and venue, an organization with a logo and address, an article with an author. Google’s introduction to structured data says it helps Google understand a page and can make a page eligible for richer results.

Two rules matter most. The markup has to match what is visible on the page. And eligibility is not a promise that a rich result will appear.

On AI answers, Google is direct. Its AI optimization guide says: "Structured data isn’t required for generative AI search." It also says there is no special schema.org markup to add for AI features, and no need for AI text files such as llms.txt to appear in Google Search.

It is still worth adding. It feeds rich results, describes events and organization details, and costs little on most CMS platforms. Our posts on Schema.org markup for AI answers and schema markup for Google AI Overviews go deeper. Read them alongside Google’s statement that markup is optional for AI features.

How AI answers pick their sources

Here is only what the platforms themselves publish.

Google. Its guide to optimizing for generative AI features says a page must be indexed and eligible to show with a snippet. The site must also be included in Search generative AI features in Search Console, a setting we covered in our post on the generative AI performance report and its opt-out. Google says there are no extra technical requirements. It also says: "No third-party tool has access to our internal ranking or AI systems."

OpenAI. Its ChatGPT search help page says results are ranked on multiple factors meant to surface relevant, reliable information, and "Placement is not guaranteed." To be eligible, a site has to let OAI-SearchBot crawl it. OpenAI’s crawler overview lists OAI-SearchBot for search and GPTBot for model training as separate settings. A site can allow one and block the other.

Microsoft. In a February 2026 Bing Webmaster blog post, the Bing team suggested keeping content fresh, using IndexNow to report changes, using clear headings and tables, and backing claims with evidence.

None of the three publishes a full list of what earns a citation. Treat any vendor that claims to know the formula with care.

Where AI search stands, as of October 2026

These facts change often. Check them before you rely on them.

Google keeps adding links and formats to AI Mode. Our post on more links in AI Mode tracks the latest changes.

Measuring SEO with Search Console and analytics

Search Console is free and is the closest thing to Google’s own view of your site. Set it up first, then add Bing Webmaster Tools.

Start with four checks:

• Page indexing report. Which pages are indexed, and why others are not.
• Performance report. Queries, clicks, impressions and average position. Google says AI feature traffic is counted here under the Web search type.
• Generative AI performance report. How often your links appeared in AI Overviews and AI Mode. It reports impressions, not clicks.
• URL Inspection. Whether one page is indexed and what Google found on it, including structured data.

Then look at your analytics. Search Console shows what happened on Google’s pages. Analytics shows what people did after they arrived: registered, joined, donated or left. OpenAI’s publisher FAQ says ChatGPT adds utm_source=chatgpt.com to referral links, so those visits can be tracked in tools like Google Analytics. Our comparison of Microsoft Clarity and Google Analytics 4 covers the analytics side.

For a nonprofit, what is SEO worth? Measure it by goals, not by rank. Ten more event registrations from search matter more than a higher average position. When numbers fall, our Search Console walkthrough for traffic drops helps tell a technical problem from a ranking change.

What SEO can’t promise

Any honest answer to what is SEO includes its limits. Google’s page on hiring an SEO says it plainly: "No one can guarantee a #1 ranking on Google." The same is true of AI citations. OpenAI says placement is not guaranteed, and Google says indexing and serving are not guaranteed.

SEO also takes time. The SEO Starter Guide says some changes take effect in hours and others take several months.

AI answers also change the math on clicks. In a Pew Research Center study of 900 US adults’ browsing in March 2025, people clicked a traditional result on 8% of visits when an AI summary appeared, against 15% when none did. Google, for its part, says clicks from pages with AI Overviews are higher quality. Both can be true. Plan for fewer but more motivated visitors on some queries.

A starter SEO checklist for small teams

Answering what is SEO for your own site starts with a short list. Work from the top down.

1. Set up Google Search Console and Bing Webmaster Tools, and submit a sitemap to each.
2. Search Google for site:yourdomain.org to confirm your pages are in the index.
3. Check robots.txt, noindex settings and your CDN for blocks on Googlebot, Bingbot and OAI-SearchBot.
4. List your ten most important pages, such as join, renew, donate, events and key resources. Give each a unique title and description.
5. Rewrite those pages in the words your audience searches with. Answer the question near the top.
6. Add real bylines and author pages to articles, reports and guides.
7. Claim and verify your Google Business Profile, if people visit you. Keep hours current.
8. Add Organization and Event structured data, matching what is on the page.
9. Ask partners, chapters and affiliates to link to resources that help their audience.
10. Review Search Console and analytics monthly. Track goals, not just rankings.

Accessibility work overlaps with this list: clear headings, alt text and readable pages help people and search engines alike. Our web accessibility guide covers that side.

Frequently Asked Questions