'AI search engine' refers to a search engine that uses artificial intelligence (AI) algorithms and techniques to improve the accuracy and relevance of search results. Traditional search engines use keyword matching and ranking algorithms to generate search results, while AI search engines use machine learning algorithms to understand the user's query and provide more personalized and accurate results. AI search engines can analyze user behavior, preferences, and history to provide more relevant search results, and can also use natural language processing (NLP) to understand the user's intent and context. AI search engines can also be used to provide personalized recommendations and suggestions based on the user's search history and behavior. AI search engines can be used in a wide range of industries, including e-commerce, healthcare, and education. However, there are concerns around the ethical and social implications of AI search engines, such as the potential for bias or manipulation in search results, as well as issues around data privacy and security.