Perplexity AI is an answer engine that provides accurate answers to complex questions using large language models. It uses large language models and search engines to deliver accurate results to users. The platform offers a variety of features, including a Chrome Extension and the ability to join and contact the Perplexity team. It can also provide answers to popular questions, such as why Fortnite is so popular and how to gain muscle quickly. Furthermore, it can offer insight into debates such as LeBron James vs Michael Jordan, as well as explain the basics of the Keto diet. All in all, Perplexity AI is a powerful answer engine that can provide accurate answers to complicated questions.