What best describes a chatbot?

A chatbot is best defined as an application that can carry on a chat conversation with a customer. This technology is designed to simulate human conversation and provide immediate responses to inquiries, assisting users by answering questions, providing information, or facilitating transactions in a conversational manner. Chatbots rely on natural language processing to understand and respond to user inputs, enhancing customer engagement and support.

The other options, while they describe useful applications, do not capture the essence of what a chatbot does. For instance, applications that improve product sales, assist with data analytics, or analyze website performance serve different purposes and may integrate various technologies, but they do not focus specifically on conversation and interaction as a chatbot does.