This document provides an introduction to chat bots, including: - Defining chat bots and the types of bots, such as rule-based and AI-powered chat bots. - Popular messaging platforms that support bots, such as Facebook Messenger. - The benefits of using chat bots like driving customer engagement and saving time. - How AI and cognitive services like natural language processing are used to implement chat bots. - Methods for promoting chat bots including traditional marketing, submissions to bot directories, and inter-bot promotions. - Popular use cases for bots in areas like customer support, news, shopping, and personal assistants.