What is Chat bot ?
A chatbot is a piece of software that conducts a conversation via auditory or textual methods. Such programs are often designed to convincingly simulate how a human would behave as a conversational partner, although as of 2019, they are far short of being able to pass the Turing test. Wikipedia
How does chat bot work ?
In other terms, a bot is a computer program that is designed to communicate with human users through the internet. … It allows a form of interaction between a human and a machine the communication, which happens via messages or voice command. A chatbot is programmed to work independently from a human operator.