This text discusses how to add chat functionality to online games using Ably's real-time messaging platform. It provides step-by-step instructions on integrating chat into a simple multiplayer game, specifically tic-tac-toe. The process involves setting up an Ably account and using its React Hooks for seamless integration with the game. The text also outlines additional features that can be added to enhance the chat functionality, such as typing indicators, presence detection, and emoji reactions.