What Is the Difference Between SEO and GEO

SEO is a set of practices for ranking pages in search results, and GEO is a research framework for raising how much of a generated AI answer credits your content. The bottom line: GEO is narrower and better evidenced than most AI marketing terms, its tested tactics are adding sourced statistics, quotations, and citations, and it depends on SEO for eligibility, so treat it as an evidence layer on top of SEO.

New to the term? What is answer engine optimization covers the basics.

1997earliest use of the term SEO, credited to Bruce Clay and John Audette's Multimedia Marketing Group

Nov 2023first appearance of the GEO paper on arXiv

KDD 2024conference where it was presented, in Barcelona

30% to 40%relative gain for the three best methods on the paper's main measure

Two different kinds of thing

	SEO	GEO
What it is	A practice built over 25 years by practitioners	A named research framework with a benchmark
Target	Ranking a URL in a list	Visibility of your content inside a generated answer
Evidence	Search engine documentation, experiments, industry studies	A controlled benchmark of 10,000 queries across 25 domains, plus later critical reviews
Levers	Relevance, links, crawlability, page experience	Adding statistics, quotations, and citations, and writing clearly
Measured by	Rank, impressions, clicks	Position Adjusted Word Count and Subjective Impression in the paper. In practice, your share of answers
Depends on	Being crawled and indexed	Being retrievable first, which is an SEO outcome

What the GEO paper tested

Aggarwal and colleagues from IIT Delhi, Princeton, the Allen Institute for AI, and Georgia Tech built GEO-bench and tested nine content changes. Cite Sources, Quotation Addition, and Statistics Addition performed best, at roughly 30 to 40 percent relative improvement on Position Adjusted Word Count, and fluency improvements added 15 to 30 percent. Keyword Stuffing, a classic SEO tactic, did not help and performed worse than the baseline in the authors' engine. The effect varied by domain. Note what was measured: the share of an answer attributed to a source, not whether a page was cited at all.

Where SEO habits help and where they fail

Help: crawlable pages, clean HTML, fast pages, internal links, helpful content. Google says these remain worthwhile for its AI features.
Fail: repeating keywords. The paper found it did not help.
Different: backlinks. A Semrush analysis of 1,000 domains, reported secondhand, found AI visibility correlated with domain authority and that nofollow links showed nearly the same relationship as followed ones, while Ahrefs found branded mentions correlated more strongly with AI Overview visibility than backlinks did. Correlations, not proof of cause.

What to do

Keep your SEO foundation in good shape.
On your key pages, add sourced numbers with dates.
Add real quotations from named people, only where they exist.
Link to primary sources for each claim.
Write in plain, fluent sentences.
Test on your own topic: compare the share of runs that name you before and after a change.

The caution

A critical survey of GEO research from 2023 to 2026 found that heuristics transfer poorly across contexts, that competition can erode gains when many sources optimize the same way, and that over optimization can hurt retrieval by the underlying index. Use the tactics as a starting point, and let your own measurement decide.

Questions people ask