How do SEO, AEO and GEO differ?
SEO concerns search discovery, AEO concerns answer presentation, and GEO concerns generated-answer visibility; these working labels overlap and do not define separate proven ranking layers.
These labels organize different questions about discovery. Their boundaries depend on the source using them. A page can be indexed, quoted in a direct answer and cited in a generated response; those events do not require three independent disciplines with three universal algorithms.
The library already answers what GEO means in AI search.
Which dated uses can we substantiate?
SEO was already established terminology when Google announced its starter guide on 12 November 2008, the earliest operator artifact examined for this entry. That announcement is not the origin of SEO, and we do not assign a first inventor from it. [Google, 2008].
A contemporary account of a Chee Lo and Jason Barnard webinar, published by Rebecca Sentance on 7 February 2018, explicitly uses answer engine optimization in the context of direct answers and voice search. It verifies use by that date. Barnard’s Kalicube article dated 30 May 2025 retrospectively claims an earlier introduction; we keep that as the author’s claim rather than an independently settled priority record. [Sentance, 2018; Barnard, 2025].
The GEO paper by Aggarwal and colleagues has a first arXiv submission dated 16 November 2023; the revised manuscript and KDD publication are from 2024. That is a verified primary research introduction of the named framework. It should not be dated solely from a later vendor explanation. [Aggarwal et al., arXiv submission history].
An attributed comparison and our working definitions
Raju and colleagues’ October 2025 IJSREM paper, Table 1 on PDF pages 3 to 4, contrasts SERP ranking, direct snippets or voice answers, and AI-generated inclusion. That is the authors’ conceptual framing, not an experiment establishing three discrete causal layers.
| Label | IJSREM Table 1’s emphasis, paraphrased | Our operational use |
|---|---|---|
| SEO | Search-result ranking and website optimization | Search discovery, crawlability and indexed presentation |
| AEO | Direct answers, structured questions and voice | Whether an answer presents the relevant, accurate information |
| GEO | Inclusion and citations in generated outputs | Observable naming and citation outcomes in specified generated answers |
The paper’s synthesis does not provide an original intervention dataset. Its stated source-selection total is also not recoverable from the shorter reference list, as our statistic-checking review explains. Its table is useful as an attributed vocabulary aid, with those limits retained.
Why vendor definitions overlap
Kalicube’s article groups acronyms around a shared brand-understanding objective. HubSpot extends AEO to generated-answer appearances. Its primary URL displayed conflicting update dates, 11 September and 26 October 2026, on 30 October. We retain that unresolved chronology; these definitions do not establish a strict snippets-versus-generated-text boundary. [Barnard, 2025; Clark, 2026].
Google’s current AI-feature guidance says ordinary SEO best practices remain relevant and specifies no extra technical requirements for its AI features beyond Search eligibility. That statement applies to Google’s described experiences, not every independent assistant or action service. [Google Search Central, AI features].
Measure the outcome rather than the acronym
Preserve the question, engine, date and answer. State the counted unit, and distinguish a name, recommendation, citation and visit.
Neither acronym turns mentions into visits or establishes conversions. Specify the observation and comparison before claiming a commercial effect.
Aggarwal and colleagues caution that “the efficacy of these strategies varies across domains” (2024, abstract, v3; verified 30 October 2026).
You can keep the labels flexible while holding the outcome definition fixed.
What our own data shows
Source archive: release 2026-09, DOI 10.5281/zenodo.22907695.
Our published framework separates naming, absence and citation. Study 1 classifies captured page signals; Study 2 describes source citations and matching vendor pairs; Study 3 registers a future comparability test for absence persistence. These are research questions with specified units, not a single SEO/AEO/GEO score.
In Study 2, 39 of 2,095 eligible target answers had empty citation lists: 1.9%, Wilson 95% interval 1.4% to 2.5%. The complete study explains why an empty citation list and an absent brand are different outcomes. That distinction survives whichever umbrella acronym a publisher prefers.
Sources
- Google. (2008, November 12). Google’s SEO starter guide. Google Webmaster Central Blog. Original announcement, not the origin of SEO terminology. https://developers.google.com/search/blog/2008/11/googles-seo-starter-guide Verified 30 October 2026.
- Sentance, R. (2018, February 7). The rise of answer engine optimization: Why voice search matters. Search Engine Watch. Contemporary account of the Chee Lo and Jason Barnard webinar; terminology evidence only. https://searchenginewatch.com/2018/02/07/the-rise-of-answer-engine-optimization-why-voice-search-matters/ Verified 30 October 2026.
- Aggarwal, P., Murahari, V., Rajpurohit, T., Kalyan, A., Narasimhan, K., & Deshpande, A. (2024). GEO: Generative engine optimization. KDD 2024. https://doi.org/10.1145/3637528.3671900 . Author manuscript v3: https://arxiv.org/html/2311.09735v3 Verified 30 October 2026.
- Raju, P. T., Reddy, S. S. R., Riyaz, S., Nausheen, S., & Manasa, G. (2025, October). Optimizing for the artificial intelligence driven search era: An integrated framework for search engine optimization, generative engine optimization, and answer engine optimization. IJSREM, 9(10). Table 1, PDF pp. 3 to 4; method pp. 4 to 5; references pp. 9 to 10. https://doi.org/10.55041/IJSREM53069 Verified 30 October 2026.
- Barnard, J. (2025, May 30). This is the era of generative and assistive engine optimization. Kalicube. Vendor terminology and retrospective AEO-origin claim. https://kalicube.com/learning-spaces/faq-list/generative-ai/generative-and-assistive-engine-optimization-moving-from-the-all-tab-to-the-ai-mode-tab-in-google/ Verified 30 October 2026.
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Broadcastwell. (2026). Absence Index, release 2026-09 [Data set]. Zenodo. Release JSON, answer JSONL and README. https://doi.org/10.5281/zenodo.22907695 Verified 30 October 2026.
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Clark, C. W. (2026). What is answer engine optimization (AEO), and how does it change SEO? HubSpot. Conflicting displayed updates: September 11 and October 26, 2026. https://blog.hubspot.com/marketing/answer-engine-optimization . Verified 30 October 2026.
- Google Search Central. (2026). AI features and your website. https://developers.google.com/search/docs/appearance/ai-features . Verified 30 October 2026.
Cite this page
Broadcastwell research team. (2026, October 30). How do SEO, AEO and GEO differ?. Broadcastwell. https://docs.broadcastwell.com/research/glossary/seo-aeo-geo/ Published 30 October 2026; updated 30 October 2026.
@online{broadcastwell2026research42,
author = {{Broadcastwell research team}},
title = {How do SEO, AEO and GEO differ?},
year = {2026},
date = {2026-10-30},
url = {https://docs.broadcastwell.com/research/glossary/seo-aeo-geo/},
urldate = {2026-10-30},
note = {Published 2026-10-30; updated 2026-10-30}
}
Prepared by the Broadcastwell research team. Lead: Maya Thompson, AI architect and specialist.
Sources checked 30 October 2026. Independent check: 30 October 2026, Broadcastwell verification desk. This page has not been peer reviewed.
Last updated: 30 October 2026. Next review: 30 January 2027.