Chatbots are computer programs that use artificial intelligence and natural language processing to simulate conversations with human users. They can be used to communicate with people, answer common questions, and perform specific tasks. Chatbots can be developed to handle simple commands or to serve as complex digital assistants and interactive agents. They can be used in messaging apps, mobile apps, websites, phone lines, and voice-enabled apps. Chatbots can understand natural human language and respond to questions in a natural, human way.