AEO – Answer Engine Optimization
Simply put: SEO is about winning the click. AEO is about winning a spot in the answer. GEO is about winning the citation. Most companies need all three, but the order and weighting change in 2026.
Summary:
SEO (Search Engine Optimization): Optimizing content to rank in search results and get clicks, typically in Google.
AEO (Answer Engine Optimization): Structuring content so that AI tools can understand, retrieve, and cite it directly in their answers.
GEO (Generative Engine Optimization): Research-backed steps to increase the likelihood of precisely your content being selected as a source in AI-generated answers.
Why this is now its own question
Google used to be the dominant domain. In 2026, an ever-growing part of the buying journey begins in AI tools like ChatGPT, Perplexity, Google AI Overviews, and Gemini. There, the searcher does not give a click; they get a complete answer. This means that it is no longer enough to rank at the top; you must be the source that is understood, mentioned, and cited.
Therefore, two new disciplines have grown alongside classic SEO: AEO (practical structuring) and GEO (research-backed citation optimization). Many people mix them up, but they partly solve different tasks.
What is SEO?
SEO is about getting your web pages to rank high in traditional search results so that people click through. The core techniques are technical SEO (speed, crawlability, mobile), on-page (title, H1, internal links, keywords), and authority building (links).
The goal: visibility in Google and traffic/clicks to your site.
What is AEO?
AEO (Answer Engine Optimization) is the practice of structuring content so that AI-powered tools can understand, extract, and cite it directly in the answers they generate. AEO builds on SEO and does not replace it.
Concrete steps: answer-first structure (the answer at the top, details below), clear H1/H2, short paragraphs, FAQ based on real customer questions, and structured data (schema markup) that tells the machines who you are and what the pages are about.
The goal: to become a source the AI actually picks out and cites.
What is GEO?
GEO (Generative Engine Optimization) is the research-backed discipline of maximizing the likelihood that your content will be selected and cited in generative answers. The term comes from the first systematic study of the field: the paper "GEO: Generative Engine Optimization" (Aggarwal, Dugan et al.), presented at KDD 2024, with research collaboration across Princeton, IIT Delhi, and Georgia Tech (arXiv 2311.09735).
The study tested nine concrete optimization strategies on 10,000 real searches (GEO-bench). The researchers measured which steps actually increased visibility in AI-generated answers.
What the research found
The most effective steps were surprisingly concrete:
Expert quotes: +41% visibility
Statistics and numbers: +33%
Fluency and linguistic optimization: +29%
Citing sources in the text: +28%
Keyword stuffing: −8% (the only step with a negative effect)
An interesting finding: pages that ranked 5th in traditional search could get up to a +115% boost in AI visibility after GEO optimization, while top-ranked pages in some cases lost up to 30% of their visibility. GEO thus levels the playing field, leaving room for players who do not dominate Google.
The goal: to win the citation when the AI chooses among many possible sources.
Comparison Table
SEO | AEO | GEO | |
Goal | Ranking and clicks in Google | Be understood and cited by AI | Win the citation in generative answers |
Who you optimize for | Googlebot | ChatGPT, Perplexity, Google AI, etc. | Generative engines' choice of source |
Core techniques | Technical SEO, on-page, links | Answer-first, FAQ, schema, structure | Quotes, statistics, fluency, source references |
Most important format | Pages that rank | Clear text AI can retrieve | Answers that convince the source selection |
Measurement | Position, clicks, traffic | Mention rate, citation rate, share of voice | Citation rate vs. competitors |
Time horizon | Months to years | Weeks to months | Weeks to months |
Does it replace the previous one? | - | No, builds on SEO | No, builds on AEO |
When you need what - a decision guide
You have just launched, not ranking: Start with SEO. Without a foundation, AI will not cite you.
You rank, but rarely appear in ChatGPT/Perplexity: You need AEO. The content is not structured to be retrieved.
You are visible in AI answers, but competitors are cited more often than you: You need GEO; sharper quotes, more statistics, and clearer authority.
Rule: SEO makes you findable. AEO makes you understandable. GEO makes you chosen.
How to work with all three in practice
Secure the foundation (SEO): Fast, crawlable page, clear H1, internal links, and consistent terminology.
Structure for answers (AEO): Write answer-first. Move the most important answer to the very top. Build FAQs based on real customer questions. Add schema markup (Article, FAQPage, Organization).
Sharp citations (GEO): Include real statistics, quotes from your own experts (with name and role), and link to sources. Avoid keyword stuffing, as it reduces visibility.
Measure monthly: Track mention rate, citation rate, and share of voice against competitors on 10–20 fixed questions.
FAQ
Are AEO and GEO the same?
No. AEO is the practical job of structuring content so that AI can retrieve it. GEO is the authority-based steps that increase the likelihood of your content being chosen as a source. GEO builds on top of AEO.
Does GEO/AEO replace SEO?
No. SEO is still the foundation. Without good SEO, you will rarely be a credible source for AI engines. Most businesses need all three.
What is the most important step to get cited in, e.g., ChatGPT and Perplexity?
Research points to three steps: real statistics (+33%), expert quotes (+41%), and an answer-first structure that makes the answer easy to extract. A single technical step alone is rarely enough.
How do I measure the GEO effect?
Track citation rate (how often you are cited as a source), mention rate (how often you are mentioned), and share of voice (your share against competitors). Test the same 10–20 questions every month for comparability.
Does keyword stuffing work in AI search?
On the contrary. GEO research found that keyword stuffing was the only step with a negative effect (−8%). AI engines reward clarity and authority, not repetition.
Do I need GEO if I already rank No. 1 in Google?
Yes. Research showed that top-ranking pages in some cases lost up to 30% of their AI visibility, while lower-ranking pages could see a boost of over 100% after GEO optimization. A good Google ranking is no guarantee for AI citation.
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Marianne Aas Lunde
Founder / AEO Specialist
Marianne leads Sikte's AEO work and helps companies get understood, cited, and recommended when buyers turn to AI assistants first.