A chatbot is an artificial intelligence program that simulates conversation with users. It's commonly used in customer service, providing automated responses to queries, assisting with troubleshooting, and guiding users through services without human intervention. Chatbots can be integrated into websites, social media platforms, and messaging apps, making them accessible for users seeking assistance anytime. They employ natural language processing (NLP) to understand and respond to various user requests, improving efficiency and customer satisfaction by delivering instant solutions.