What's the difference between SEO, AEO, GEO, and WebMCP?

Four games, not one

The biggest mistake is treating these as the same discipline with new labels. They optimize for genuinely different mechanisms, are measured by different numbers, and have different winners. Here's the honest breakdown.

SEO — the ranked link

Classic search engine optimization competes for a position in a list of ten blue links. Levers: keywords, backlinks, technical health, content depth. Metric: rankings, click-through, sessions. Win condition: out-rank competitors this quarter. The weakness: your rank is rented — a bigger budget displaces you next quarter, and the click it earns is shrinking as AI answers intercept it.

AEO — the cited source

Answer Engine Optimization competes to be the single named source inside one AI-generated answer (ChatGPT, Perplexity, Google AI Overviews, Gemini). Levers: retrievability, extractable answers, entity clarity, corroborated authority. Metric: inclusion rate and cited share. Win condition: become the source the engine re-cites for years. The strength: first-mover citations tend to compound — once an engine commits to citing you, that re-citation becomes corroborating signal and the position reinforces itself.

GEO — the upstream corpus

Generative Engine Optimization works further upstream than AEO. Instead of optimizing the page a live engine retrieves, GEO influences the training and retrieval corpora the models draw from — being present, accurate, and well-represented in the open-web data, datasets, and high-authority sources that models learn from and reach for. It's slower and less directly controllable, but it shapes the baseline knowledge a model has about you before any live retrieval happens. AEO and GEO overlap heavily and are best run together.

WebMCP — the agent interface

WebMCP is the newest and most forward-looking. It applies the model-context-protocol approach to the web: exposing structured endpoints so AI agents can query your site directly and get structured answers in real time, rather than scraping rendered HTML. It's the difference between being readable and being callable. Most businesses are nowhere near this, which is exactly why moving early compounds.

Expert Take — Jason Burns: The row that matters most is defensibility. In SEO your rank is rented — someone outspends you and you're gone. In AEO, once an engine names you as the answer, it re-cites you, that re-citation becomes signal, and you get harder to dislodge over time. First movers don't just win early; they get a moat. That's why we engineer one client per market — you can't ethically build two competitors to win the same single answer.

How they fit together

They fit together as a stack, not a menu: SEO fundamentals are the floor, AEO is the active layer where citations are won today, GEO shapes the model's baseline knowledge over time, and WebMCP is the agent frontier. They're a stack, not a menu. SEO fundamentals (crawlable, fast, structured) are the floor everything stands on. AEO is the active layer where citations are won today. GEO shapes the model's baseline knowledge of you over time. WebMCP is the frontier where the agent-driven web is heading. You don't pick one — you build the floor, win citations now, and move early on the frontier.

In the field — of everything in that comparison, the row that actually matters to me is defensibility, because it's the one that determines whether your investment compounds or evaporates. In SEO your rank is rented — someone with a bigger budget outspends you and you're gone next quarter. AEO works the opposite way: once an engine commits to naming you as the answer, it keeps re-citing you, that re-citation becomes its own corroborating signal, and you get progressively harder to dislodge. First movers don't just win early; they build a moat that widens over time. That's the entire reason I push clients to move now instead of waiting — the slots are still being assigned, and the cost to take one only goes up.

Which to prioritize

Prioritize the SEO fundamentals first (especially SSR and indexing), then run AEO hard because that's where citations are decided today, let GEO accrue from authoritative content, and pilot WebMCP early. Most businesses should sequence it: get the SEO fundamentals right (especially server-side rendering and indexing), run AEO hard because that's where citations are decided today, let GEO accrue as a byproduct of authoritative content, and pilot WebMCP early for the compounding first-mover edge.

In the field — I sequence every engagement the same way: fix the foundation, win citations now with AEO, let GEO accrue from good content, and pilot WebMCP early. People want to start with the shiny frontier stuff. I make them earn it by clearing the floor first.