SEO optimizes websites to achieve higher positions in search engine result pages. GEO, or generative engine optimization, aims to help AI systems identify the best answers to user queries. These two fields exist independently of one another. SEO produces the signals that GEO relies on. Therefore, all companies should begin with SEO before moving into GEO.

That is the short version of the relationship between GEO and SEO. The extended version reveals the marketing that each field receives. Companies distribute their money into these two fields in the wrong way because of the marketing that they receive individually.

What are the fundamental differences between SEO and GEO?

SEO’s objective is to achieve a leading position in search results. For instance, search results might show the first position, the third position, a featured snippet, and a map pack listing. The goal is to achieve a click from the user.

GEO, on the other hand, needs to receive a mention. For instance, if a user asks ChatGPT the best accounting software for freelancers, the system might list three different software packages. GEO’s job is to ensure that your software is one of those three. There might not be a click on any of the results.

 SEOGEO
GoalRank a pageGet the brand cited in an answer
Where it plays outGoogle, Bing results pagesChatGPT, Gemini, Perplexity, AI Overviews
Unit of successPositionMention or citation
Main measurementRankings, clicks, impressionsCitation frequency, share of voice, branded search lift
Content that winsComprehensive pages matching intentClear, quotable, factually dense passages
Authority signalBacklinksConsistent mentions across trusted sources
Typical time to result3–9 months2–6 months
Click outcomeThe pointOften absent

The table shows only the basic commonalities between these two systems. A page that ranks well usually has the properties an AI system looks for — it is crawlable, clear, and covers the topic properly. The two fields maintain their independence from each other because they do not compete against each other.

AI chat prompt. Artificial intelligence and digital technology. Man using chatbot with laptop at work. Creative content. Generate text or image. Command input on website. Bot assistant conversation.

Does SEO still work in 2026?

Yes, despite the claims to the contrary from those who benefit from selling the replacement for SEO.

Google operates for the majority of the time that users spend on the internet searching for information. AI Overviews appear above the organic results but do not replace them. AI systems create their overviews from data that originated from the sources that are indexed and crawled by search engines. Your website must be indexed and trusted to be included in the synthesis of this information by AI systems.

The search results have undergone a transformation from the past. In the past, results appeared in search results to deliver clicks to the website. Now, results deliver AI mentions of the website instead.

Search engines generate fewer visitors to your website despite the fact that your website appears more frequently in search results. The marketing measurement of website sessions indicates that your efforts are successful when, according to the number of visitors to a website, they appear unsuccessful.

What does GEO actually involve?

GEO involves strategies that are straightforward according to the system’s name.

One of the main strategies is to provide a clear explanation of your business and its strategy to AI systems. The AI systems learn about your brand by reading all of the mentions of your brand across the web. If there are conflicting messages about your business in these different sources, the system will fail to recommend your brand’s products or services.

Another strategy is to have quotable content on your website. AI systems read short passages from your website to learn about your brand and products. For instance, a page that begins with a direct response of fifty words will be read by the AI systems. However, a page that begins with “in today’s fast-paced digital landscape” will be ignored by the AI systems.

AI systems look for verifiable specifics on your website. For instance, including named brands, numbers, and sources will increase the chances that your claims will be verified and gain value in the AI system.

Your brand’s online presence should extend beyond your website domain. Most businesses fail in this goal. Your website is only one input into the AI system. Other online sources that mention your brand include reviews, press coverage, directory listings, podcasts, and industry citations. If twenty different sources all have the same description of your brand, you will perform better in AI systems than if you maintain a perfect website for your business but have no external online presence. Your website should have schema markup, consistent data about your business, and an unambiguous description of what your business does. These methods may appear basic but they produce effective results in AI systems.

Which do you need first?

Almost always, you need SEO before GEO.

GEO requires the foundation that is laid by SEO. Your website currently lacks the necessary features to support crawling, indexing, and content that informs AI systems about your brand. Citation optimization for your website will not work if the systems cannot find it.

There are three exceptions to this rule.

If your SEO strategy is effective but you receive few visitors to your website, you should focus on GEO instead. You are getting visibility for your brand, but users are choosing to summarize your content rather than click on your website.

If your business is in a market where users ask AI systems for suggestions for specific products or services, GEO will benefit you the most from your search budget.

If your competitors are appearing in AI system results for queries related to your industry but you are not, then GEO will work to fix this issue.

What does this mean for your budget?

GEO should be a part of your search budget, not separate from it. Most businesses dedicate 70% of their search budget to SEO and 30% to GEO. As your SEO foundation matures, the ratio of your search budget will shift toward GEO.

How do you measure GEO when there are no clicks?

There is a problem with measuring GEO.

  • The metrics that might work include:
  • Citation frequency
  • Share of voice
  • Branded search volume
  • Direct enquiry attribution
  • Referral traffic from AI platforms

The AI visibility checker from Castle allows you to check your brand’s position in AI systems for free.

The honest summary

If you must choose one, choose SEO. Business leaders have a fundamental choice to make. The business that dominates search visibility in 2026 will use SEO to gain visibility and trustworthiness and GEO to gain mentions in AI systems. Most of your competitors are in the middle of these two elements.

Key takeaways

  • SEO wins positions and clicks
  • GEO wins mentions in AI responses
  • GEO depends upon SEO
  • If you are losing website traffic but your rankings are stable, you are being summarized by users
  • Most businesses should divide their search budget 70% into SEO and 30% into GEO

GEO is measured through mentions, not clicks