Hallucination
A hallucination is what people call it when an AI says something false as if it were plainly true. These systems are built to sound fluent and certain, and most of the time they are also right — but not always. When the facts run thin, an answer engine will sometimes fill the gap with a confident guess, and it does not sound any less sure when it does.
For a business, this stops being abstract very quickly. An assistant might tell a customer you close at five when you close at seven, quote a price you have never charged, place you in the wrong town, or credit you with a service you don't offer. The customer has no reason to doubt it — the answer arrived smoothly, with all the confidence of a fact — and they may act on it before you ever hear a word.
You cannot switch hallucinations off, but you can starve them. These systems invent most freely where clear information is missing. When the truth about you is stated plainly, consistently, and in places a machine can read — your own site first, then the wider web — there is less empty space for a guess to grow in. Being the clear, obvious source on your own facts is the best protection there is.
Think of it as a confident stranger giving directions to your door — sometimes perfect, sometimes sending people to the wrong street, always sounding sure. You can't stop strangers from talking about you, but you can make the real directions so clear and easy to find that they are the ones repeated. Getting your own facts straight, in public, is how you keep the story about you true.