What is a sponsored prompt?

Where it sits

Most conversational formats appear once a conversation is under way and the user's intent is known. A sponsored prompt is the opposite: it appears before there is any intent, and its function is to start one.

That makes it the closest analogue in AI media to a display placement — bought against a surface and an audience rather than against a stated need. It is also the format with the clearest separation between advertising and answer, because the user chooses whether to engage before anything is generated.

What it is good for

• Category creation. Prompting a question the user did not know to ask.
• Seasonal and event-driven demand, where the timing is known and the intent is not yet expressed.
• Brand-adjacent education, which builds the presence that later answer insertion depends on.
• Reaching upstream of a decision, before comparison narrows the field.

Why it converts differently

A sponsored prompt reaches people who have expressed no need, so response rates look like display rather than like intent-matched placement. Judged on immediate conversion it will almost always lose to a sponsored card served against a stated buying question.

That is the wrong comparison. Its job is to create the conversation that later formats monetise, which means it should be evaluated on the intent it generates and on downstream effect rather than on direct response. Held to a last-click standard it will be defunded, and the intent-matched inventory it was feeding will quietly shrink.

This is a specific instance of the general measurement problem on these surfaces — see measuring AI assistant ad performance honestly.

The design constraint

A sponsored prompt has to be a question a user would plausibly want answered. One that reads as an advertisement is ignored, and one that misrepresents what follows produces a conversation the user immediately abandons — which is worse than no placement, because it costs the publisher a session.

Disclosure is required, and in practice does not hurt performance much. What hurts performance is a prompt that is not genuinely interesting.