PubNub Data Streams enables the establishment and maintenance of persistent socket connections across various devices, facilitating real-time data streaming to global audiences in under a tenth of a second using the Publish/Subscribe model. It supports a wide range of streaming protocols like WebSockets, SignalR, Socket.IO, and WebRTC Data Channel, allowing data to be broadcast to millions of users for applications such as multiplayer games and audience participation apps, or used for one-to-one device signaling in scenarios like call triggering and location tracking. The platform offers comprehensive resources, including a Getting Started Guide for their JavaScript SDK, and showcases demos for building real-time applications, such as chat services and financial data streaming.