Perplexity AI is an AI search engine designed to deliver accurate answers to complex questions. It utilizes large language models and search engines to provide answers to a wide range of questions, as well as natural language understanding to interpret user inputs and provide specific answers. It is suitable for students and researchers seeking accurate answers, professionals looking to improve their knowledge, and general users wanting a powerful tool to help answer their questions. However, it is important to note that Perplexity AI is not liable for any offensive or dangerous content generated by the engine. For assistance with internal data searches, users can contact the support team via Twitter, Discord, or email.