Glossary
What is an advertisement?
An advertisement is a paid message delivered through a media channel to promote a product, service or brand to an audience. Three properties define it: someone paid, someone else controls the channel, and the audience can tell.
The three properties
The definition is worth being precise about, because the edges are where all the regulatory and ethical difficulty lives.
Payment. Value changed hands for the placement. Without it you have editorial, or word of mouth.
A channel someone else controls. Content on your own site is marketing; the same message on a channel you paid to appear in is advertising.
Disclosure. The audience can tell it is paid. This is the property that most often fails, and the one every advertising regulation in every jurisdiction is fundamentally about.
Why the definition is being tested
Each new medium blurs one of the three, and the industry re-litigates the same argument.
Native advertising blurred disclosure by matching the surrounding content. Influencer marketing blurred the channel — the person is the channel and also the message. Retail media blurred all three, since a sponsored product in a search result is paid, on someone else's channel, and frequently indistinguishable from an organic one.
AI answers push hardest of all. When a brand is named inside a generated response, the payment may be real, the channel is definitely someone else's, and disclosure has to be constructed deliberately because the medium provides no natural separation between the ad and the content.
What an advertisement is inside an AI answer
On a page, an ad is a bounded object: a rectangle with edges, in a slot, visually distinct. In a generated answer none of that exists.
What survives is the disclosure requirement, and it becomes the entire design problem. The workable formats separate the paid element from the answer structurally — a labelled card beneath the response — or, where the brand appears inside the answer, disclose it explicitly and constrain payment to selecting among genuinely suitable options. See conversational ads and sponsored intelligence.
The commercial reason to hold that line is not compliance. An assistant whose answers can be bought is worthless, and the inventory disappears with the trust.
Common questions
Is a sponsored recommendation in an AI answer an advertisement?
Yes, on all three tests — paid, on a channel the brand does not control, and requiring disclosure. The fact that it renders as prose rather than as a rectangle changes the format, not the category.
Is content marketing advertising?
Not by this definition, when it runs on channels you own. Pay to distribute it somewhere else and it becomes advertising, with the disclosure obligations that follow.
Where we write about advertisement
More in ad formats and creative
The shapes an ad takes, and where it sits.