PubNub is a real-time communication platform designed to facilitate the creation of interactive applications by providing cloud-based infrastructure and APIs that enable instant message transmission between devices, apps, or services. Utilizing a global ultra-low-latency data stream network, PubNub employs a Publish/Subscribe (Pub/Sub) messaging pattern, allowing messages to be published to channels and instantly received by all subscribed clients. This system supports various use cases, including chat, live dashboards, multiplayer games, and location tracking, by offering features such as presence detection, message persistence, and serverless logic with PubNub Functions. With reliable scalability, a 99.999% uptime SLA, and Points of Presence across key global regions, PubNub ensures low-latency communication, even under poor network conditions. The platform also supports JSON Web Tokens (JWT) for secure authentication and authorization, and provides developer ecosystems with AI integration, code templates, and over 50 SDKs to streamline real-time development for web, mobile, gaming, and IoT applications.