@test29998411 Thanks for posting your questions in Microsoft Q&A forum. Apologize for any inconvenience caused with this.
Azure Web PubSub service for building real-time web applications with WebSockets Azure Web PubSub Service helps you build real-time messaging web applications using WebSockets and the publish-subscribe pattern easily. This real-time functionality allows publishing content updates between server and connected clients (for example a single page web application or mobile application). The clients do not need to poll the latest updates, or submit new HTTP requests for updates.
You can refer to these documentations for more information about Web PubSub.
Feel free to reach back to me if you have any further questions on this.