The marketing-acronym pile has grown crowded as AI engines have changed what “being found” means. AEO, SEO, GEO, and SXO are now used interchangeably by some, distinguished sharply by others. This article defines each precisely and explains how they relate — so B2B teams can decide which disciplines to invest in and how they fit together.
The four disciplines, defined
SEO (Search Engine Optimization) is the oldest and most established discipline — the practice of optimizing content and technical foundation so that pages rank well in traditional search engine results pages (SERPs) like Google and Bing. SEO success means a high ranking and a click-through to your site.
AEO (AI Engine Optimization) is the practice of optimizing content, schema, and authority signals so AI engines like ChatGPT, Perplexity, Claude, and Google AI Overviews cite your business when answering buyer-research questions. AEO success means being named or linked inside the AI’s synthesized answer.
GEO (Generative Engine Optimization) is essentially a synonym for AEO, used more commonly in academic and research contexts. The 2023 paper “GEO: Generative Engine Optimization” by Aggarwal et al. introduced the term, and it persists in technical literature. In practice, GEO and AEO refer to the same discipline.
SXO (Search Experience Optimization) is the practice of optimizing the complete search-to-conversion experience — combining SEO (ranking), CRO (conversion rate optimization), and UX (user experience) into one discipline. SXO success is measured in pipeline impact, not rankings.
Common questions
Are AEO and GEO the same thing?
Yes, functionally. GEO came first as the academic term; AEO emerged as the industry-friendly synonym. Most agencies and B2B marketers use AEO in 2026. Academic papers and AI research more often use GEO. Both describe the discipline of optimizing for AI engines, not traditional search engines. If you see both terms, treat them as interchangeable.
Is AEO replacing SEO?
No — they coexist. SEO remains essential for buyers who still use Google, Bing, and other traditional search engines (which is still most of them in 2026, especially for late-stage research and direct comparison shopping). AEO addresses the growing share of early-stage research happening inside AI engines. B2B teams need both running in parallel; one does not replace the other.
What’s the overlap between SEO and AEO?
Substantial. Both reward clean technical foundations (semantic HTML, fast Core Web Vitals, mobile responsiveness, proper sitemaps). Both reward topical authority (deep content on a subject). Both reward authority signals (named authors, organizational identity, trustworthy citations). The divergence is in specifics: AEO weights structured data (JSON-LD schema) and content format (Q&A structure) more heavily; SEO weights traditional ranking factors like backlinks and click-through rate.
Is SXO different from CRO?
SXO is broader. CRO (Conversion Rate Optimization) focuses specifically on the percentage of visitors who convert — typically through landing page testing, form optimization, and funnel analysis. SXO encompasses CRO but also includes SEO (getting visitors to arrive) and UX (the experience from arrival to conversion). SXO is the holistic version; CRO is one component within it.
Which discipline should B2B teams invest in first?
It depends on your starting point. If you have no search presence at all, start with SEO — it’s mature, well-documented, and produces predictable results. If you have SEO but no AI presence, add AEO — it’s where the strongest competitive advantage exists in 2026 because most B2B competitors haven’t started yet. If both are healthy and conversion is the weak link, invest in SXO. Most mature B2B teams need all three running simultaneously, scaled to their stage.
How do the metrics compare?
SEO metrics: rankings, organic sessions, CTR, keyword positions. AEO metrics: citation share, citation accuracy, share of voice across AI engines, AI-attributed pipeline. SXO metrics: conversion rate, pipeline velocity, revenue per visitor, customer acquisition cost. They share underlying foundations (organic visibility, content quality) but report on different layers of the funnel.
Can one team do all four?
Yes, if the team is sized appropriately and disciplined about which discipline they’re working on at any given moment. The disciplines share more foundations than they differ; a competent SEO team can typically add AEO with two to four weeks of training, and SXO is more about cross-functional collaboration than entirely new skills. The risk is treating all four as “one job” and underinvesting in the unique requirements of each.
How this applies to your business
A practical 2026 framework for B2B marketing teams: treat SEO and AEO as parallel disciplines that share infrastructure but require distinct content and measurement. Treat SXO as the orchestrating layer that ensures visibility from either discipline converts to pipeline. Don’t worry about GEO vs AEO terminology — pick whichever term your team prefers and stick with it.
Resource allocation guidance: for B2B firms with mature SEO (consistent organic traffic, top-3 rankings on category terms), shifting 25–40% of SEO budget into AEO produces the best risk-adjusted return in 2026. For firms still building SEO, treat AEO as additive — add the foundational AEO work (schema, llms.txt, structured content) without sacrificing SEO investment, since the foundations overlap.
The biggest strategic mistake is choosing one discipline at the expense of the others. Buyers research across all surfaces — Google for some questions, ChatGPT for others, vendor websites for evaluation. A team strong in SEO but absent from AI citations loses early-stage buyers. A team optimized for AI citations but invisible in Google misses late-stage research. The right answer is all three, scaled appropriately.
Iscope Digital’s
AI Engine Optimization service handles the AEO layer; our team works alongside in-house SEO teams or established SEO partners to ensure the disciplines reinforce rather than duplicate. For the foundational definition of how AEO differs from SEO specifically, see
What is AI Engine Optimization (AEO) and how does it differ from SEO? 
