A chatbot is a computer program designed to simulate conversation with human users. It uses artificial intelligence (AI) to understand and respond to text or voice inputs, making it useful for customer service, information retrieval, and entertainment. Chatbots can be found on websites, messaging apps, and social media platforms, providing instant responses to user inquiries. There are two main types of chatbots: rule-based and AI-driven. Rule-based chatbots follow predefined scripts and can only respond to specific commands, while AI-driven chatbots learn from interactions and improve over time. Popular examples of chatbots include Siri, Alexa, and various customer support bots used by companies.