Sign up for the daily CJR newsletter . AI companies are pouring energy into tools that they say don’t just answer questions, but remember things about their users through chat conversations , search histories , social media feeds , code bases , and any other data. That’s all advertised as being helpful. “The more you use it, the more useful it becomes,” OpenAI says , while Google’s Gemini assures people that it “ understands you .” But what do we really know about what chatbots remember and how those memories affect what people see?  A few recent papers test how chatbots’ personalization features—such as memory—work. They give us a glimpse, for the first time in a systematic way, of how these features shape the information we receive. That’s important, because the main reason people use AI is for information-seeking .…