Answer Engine

An answer engine is a system that responds to a question with a composed answer rather than a list of documents to go and read. ChatGPT, Claude, Gemini and Perplexity are answer engines; so, increasingly, is the top of a Google results page. The defining move is that the system takes on the work of reading the sources.

The one difference, and what follows from it

A search engine’s product is a ranked list. It is explicit about the fact that it has not read anything for you: here are ten places, one of them probably has it. An answer engine’s product is a paragraph. It has read the sources, decided what they collectively say, and written that down.

Everything else follows from that. There is no second page, because there is no page at all: there is one answer. There is no click-through rate for a source that was read but not named. And the competition is no longer for a position in a list but for inclusion in a paragraph, which is a smaller space with no fixed number of slots.

Why the term is worth keeping separate from “search engine”

The two are converging, which is exactly why the distinction is useful to hold onto. A results page that leads with a generated summary is behaving as an answer engine at the top and a search engine below it, and those two regions reward completely different things. The summary rewards being citable; the list below rewards ranking. A site can do well in one and be invisible in the other.

The optimisation practice aimed at the first of those is answer engine optimisation, and the broader family that includes it is generative engine optimisation.

One question people ask

If the answer engine reads the sources, does anyone still visit them?

Fewer people, and for different reasons. A question fully answered in the paragraph produces no visit; that is a zero-click search. What still produces a visit is a question the answer raises: the person who reads that a business does the thing they need and now wants the price. Being named in the answer is what puts a business in front of that second question at all.

Sources

This entry defines a term. No third-party figures are used on this page.