Agentic browsing, agent readiness, GEO: which word means what

In the space of about a year, the vocabulary for “AI and your website” exploded. Google shipped a Lighthouse category called agentic browsing. The field has settled on agent readiness for the underlying property. Marketers say GEO, or AI SEO, or agent-ready. These words get thrown around as synonyms, and they are not, and the confusion is expensive: people pour effort into the wrong layer because they cannot tell which problem a term names. This is the map. It leans on the broader SEO vs GEO vs agent readiness guide and adds the term that arrived most recently.

01 · Three levelsBehaviour, property, citation

The fastest way to sort the terms is to notice they answer different questions:

• Agentic browsing answers “what is the agent doing?” It is a behaviour: an agent navigating and acting on your site.
• Agent readiness answers “can it do that?” It is a property of your site: discoverable, parseable, operable.
• GEO answers “will an assistant mention you?” It is about being chosen in an answer, a matter of authority and presence.

Behaviour, capability, and preference. Once you slot a term into one of those three, the overlaps stop being confusing.

02 · The newest wordAgentic browsing: the behaviour (and Google's audit)

The word does double duty, which is half the confusion. It names both the thing agents do and the audit that scores your readiness for it. The audit is deliberately narrow: it checks your accessibility tree, your layout stability, your llms.txt, and your WebMCP tools. Useful, but a sample, not the census. The full explainer is what is agentic browsing.

03 · The bigger frameAgent readiness: the property (and the score)

If agentic browsing is the driving, agent readiness is the roadworthiness. Google’s audit is one inspection of that roadworthiness, focused on what it can see through Chrome. A fuller agent-readiness view, the one Nilkick scores, also weighs crawler rules, markdown content negotiation, structured data, and protocol-discovery signals the Lighthouse audit does not touch. Same property, wider lens.

04 · The mapHow the terms nest

The top three are one topic at different zoom levels: a behaviour, a narrow measurement of readiness for it, and the full property. The bottom two are separate jobs, mapped in detail in the three-jobs guide. The trap is treating a good Agentic Browsing ratio as “I am agent-ready” (it is a sample) or treating agent readiness as GEO (usable is not the same as chosen).

05 · Pick the frameWhich word you actually need

Most teams arrive here from a PageSpeed report that said “Agentic Browsing 2/3” and want to know what to do. The honest answer is that you are really asking about agent readiness, the property, and the audit is just a partial window onto it. So use “agent readiness” when you mean the work of making your site usable by agents, use “agentic browsing” when you specifically mean the behaviour or Google’s audit, and keep “GEO” for the separate question of whether an assistant will name you. Name the level you are working at, and you stop spending render-layer effort on a citation problem, or citation effort on a capability gap.