AI search is becoming more personal. That can be useful. A search engine that understands location, language, previous activity, travel plans, or product preferences can skip generic advice and move closer to what the user actually needs. But there is a trade-off. The more an answer depends on hidden context, the harder it is to understand why that answer appeared. Two people can ask the same question and receive different AI answers. Both answers may look complete. Neither user may know what changed. The Shift: From Ranking Personalization to Answer Personalization Search personalization is not new. Google Search Help explains that results and recommendations can be affected by account activity, location, language, device type, and current searches through Search personalization settings . In classic search, those signals usually changed ranking order, local results, suggested searches, or which content block appeared first. In AI search, those same kinds of signals can change the generated answer itself.…