SEO vs GEO vs AEO vs LLMO: The Complete 2026 Guide to Getting Found

For twenty years, "getting found online" meant one thing: ranking on Google. That era is ending. People now ask ChatGPT for the best local plumber, tell Perplexity to compare products, and read Google's AI Overview without ever clicking a link. Over 60% of Google searches now end without a single click.

To stay visible, businesses need to optimize for four overlapping disciplines — SEO, GEO, AEO, and LLMO. This guide explains what each one is, how they differ, and where to start.

The four disciplines at a glance

• SEO (Search Engine Optimization) — ranking in traditional Google and Bing search results.
• GEO (Generative Engine Optimization) — getting recommended and cited by AI assistants like ChatGPT, Gemini, Perplexity, and Copilot.
• AEO (Answer Engine Optimization) — being selected as the direct answer in Featured Snippets, AI Overviews, and voice assistants.
• LLMO (Large Language Model Optimization) — structuring your site so large language models can read, trust, and reference it accurately.

SEO: still the foundation

SEO hasn't gone away — it's the base layer everything else builds on. It covers the fundamentals: fast, mobile-friendly pages; clear title tags and meta descriptions; helpful content; and a crawlable site structure. If Google can't understand your site, neither can the AI systems that increasingly train on and cite the open web. Learn more in our deep dives on GEO and AEO.

GEO: showing up in AI recommendations

When someone asks ChatGPT "what's the best landscaping company in Sacramento?", the answer is shaped by how clearly your site communicates who you are, what you do, and where you operate. GEO is about entity clarity and citation-worthiness: consistent business information, structured data, and content that AI systems can confidently attribute to you. AI-referred web sessions jumped over 500% year-over-year in 2025 — a channel almost no small business is optimizing for yet. Read the full GEO guide →

AEO: winning the answer box

AEO focuses on getting quoted. That means formatting content as clear questions and answers, adding FAQ schema, earning E-E-A-T signals (Experience, Expertise, Authoritativeness, Trust), and being concise enough that an answer engine can lift a sentence directly. When AEO works, your business name appears in the answer even when nobody visits your page. Read the full AEO guide →

LLMO: being readable by language models

LLMO is the newest layer. It asks a simple question: when a large language model encounters your site, can it accurately understand and represent your business? That depends on clean semantic HTML, explicit facts stated in text (not buried in images), an llms.txt file, and a crawl policy that welcomes AI bots. Read the full LLMO guide →

How they fit together

These aren't four separate projects — they're one strategy viewed from four angles. Strong structured data helps SEO and GEO and AEO. Clear, factual writing helps AEO and LLMO. The businesses that win in 2026 treat them as a single system: make your site fast and crawlable, state your facts plainly, mark them up with schema, and earn trust signals.

The goal is no longer just "rank #1 on Google." It's "be the answer" — wherever the question is asked.

See how your site scores

SiteScoreNow audits any website across SEO, GEO, AEO, and LLMO and gives you a prioritized, plain-English action plan. Get a free instant score, or order the full report to see exactly what to fix first.