The quick answer: three terms, what they mean
These three terms cause confusion because they overlap in the same search context but refer to different things. Two of them are disciplines and one of them is a product name.
SEO is a practice: a set of activities aimed at improving a website’s ranking position in search engine results pages. It has been the primary search marketing discipline for over two decades.
GEO is also a practice: a set of activities aimed at improving the probability that AI systems cite your content in their generated responses. GEO extends SEO rather than replacing it.
SGE is a product name: specifically, the testing-phase name for Google’s AI-generated answer feature. SGE became Google AI Overviews in May 2024. When practitioners say “SGE,” they are referring to the same product as “AI Overviews.” SGE is not a separate discipline or strategy, it is what you optimise for when doing GEO on Google Search.
SEO: the foundation
SEO is the practice of improving a website’s visibility in organic search results. It optimises for ranking position, appearing high in the list of links that Google returns for a relevant query.
SEO has three core components: technical health (crawlability, indexation, page speed, Core Web Vitals), content quality and keyword relevance (topic coverage, depth, structure), and authority signals (backlinks, brand mentions, domain reputation). Google’s ranking algorithm has been refined over two decades, and the measurement infrastructure for SEO is mature and automated.
Success in SEO is measured by ranking position (tracked in tools like Semrush, Ahrefs, or Google Search Console) and organic traffic (tracked in Google Analytics or Search Console). A site ranking at position one for a high-volume query is succeeding at SEO for that query.
GEO: the AI search layer
GEO is the practice of optimising content and web presence so that AI systems, including ChatGPT, Perplexity, and Google’s AI Overviews, extract and cite your content in their responses to user queries.
GEO extends SEO. The technical and content foundations that make a site perform well for SEO (indexability, content quality, domain authority) also contribute to GEO. GEO adds specific requirements on top: answer-first content structure, FAQPage schema and other machine-readable markup, entity consistency across the web, and confirmed AI crawler access.
Success in GEO is measured differently from SEO. There are no ranking positions in AI-generated answers, citation is binary. Your content is either cited as a source or it is not. Measurement is primarily manual: testing target queries in Google AI Overviews, ChatGPT, and Perplexity monthly and logging whether your brand or content appears. Automated measurement tools are emerging but not yet comprehensive.
SGE: the old name for AI Overviews
SGE stands for Search Generative Experience. Google used this name during the testing phase of its AI-generated answer feature, from May 2023 through May 2024. When the feature launched as a standard product in May 2024, Google renamed it Google AI Overviews.
The term SGE has persisted in practitioner vocabulary because many SEOs learned about the feature under that name and because significant search volume still exists for the term. SGE and AI Overviews are the same product. When someone asks “how do I optimise for SGE,” they mean the same thing as “how do I appear in AI Overviews.”
SGE is not a third discipline alongside SEO and GEO. It is the Google product that GEO targets on Google Search. Optimising for SGE means doing GEO focused on Google’s AI Overviews specifically.
How the three relate in practice
The relationship is straightforward once the product/practice distinction is clear.
SEO is the foundation. GEO is an additional layer built on top of SEO. AI Overviews (SGE) is the Google product that sits at the intersection, appearing in Google Search results and affected by both SEO signals (domain authority, indexation quality) and GEO signals (content structure, FAQPage schema, entity consistency).
A site with strong SEO but no GEO optimisation may rank well organically but appear rarely in AI Overviews. A site doing GEO without the SEO foundation may have well-structured content that AI systems cannot find because it is poorly indexed or lacks authority. The programmes compound, and a site doing both has higher citation probability and ranking performance than a site doing either alone.
Comparison summary
| SEO | GEO | SGE / AI Overviews | |
|---|---|---|---|
| What it is | A practice | A practice | A Google product |
| Goal | Rank high in organic results | Be cited in AI-generated answers | Not a goal — a target platform |
| Success metric | Ranking position, organic traffic | Citation presence (cited or not) | Being cited in AI Overview responses |
| Optimises for | Google’s ranking algorithm | AI extraction and citation systems | AI Overviews specifically |
| Tooling maturity | Mature — Search Console, Ahrefs, Semrush | Early — manual testing, limited automation | As for GEO |
| Relationship | Foundation discipline | Extends SEO | Google’s AI answer feature |
Frequently asked questions
What is the difference between SEO and GEO?
SEO (Search Engine Optimization) aims to rank web pages as high as possible in Google’s organic results list. Success is measured by ranking position and organic traffic. GEO (Generative Engine Optimization) aims to get content cited as a named source in AI-generated answers from systems like ChatGPT, Perplexity, and Google’s AI Overviews. Success is measured by citation presence: whether your content appears in AI responses to relevant queries. GEO builds on the same technical and content foundations as SEO and adds answer-first content structure, FAQPage schema, and entity consistency as additional requirements.
Is SGE the same as AI Overviews?
Yes. SGE (Search Generative Experience) was Google’s testing-phase name for the feature that launched as Google AI Overviews in May 2024. The two names refer to exactly the same product. SGE was used from May 2023 through May 2024 while the feature was in limited testing. Google AI Overviews has been the official name since the feature became a standard part of Google Search in May 2024. Both terms appear in practitioner content because significant search volume still exists for the SGE name.
What does GEO stand for in SEO?
GEO stands for Generative Engine Optimization. In the context of SEO, it refers to the practice of optimising content and web presence for generative AI systems — the AI-powered tools that synthesise answers from multiple sources rather than returning ranked lists of links. GEO is the AI search layer built on top of traditional SEO practice. It adds specific requirements (answer-first content structure, FAQPage schema, entity consistency, AI crawler access) to the existing SEO foundation rather than replacing it.
Do I need to do SEO, GEO, and SGE separately?
No. SEO and GEO are integrated in a single programme, and SGE is not a separate practice at all, it is the Google product you are targeting with GEO on Google Search. A unified approach covers SEO foundations (technical health, content quality, authority building) and GEO additions (answer-first structure, FAQPage schema, entity mapping) in a single audit, a single content brief template, and a single reporting dashboard. Running them as separate programmes duplicates auditing effort and misses the compounding value of the shared technical foundation.
Which is more important — SEO or GEO?
Neither replaces the other, and the question presents a false choice. SEO remains essential for the commercial, product, and brand queries that drive most of a business’s high-intent traffic, queries that rarely trigger AI Overviews. GEO matters most for the informational and comparison queries where AI-generated answers are increasingly absorbing clicks that previously went to organic results. A business investing only in SEO risks losing visibility on informational queries without being cited in those AI answers. A business investing only in GEO lacks the authority and indexation foundation that makes AI citation more likely. The integrated programme outperforms either alone.
