How does Django channels work?

To begin with, channels is nothing but an asynchronous task queue. It’s very similar to celery, the major difference being in performance & reliability. Channels is faster than celery but celery is more reliable.

Channels preserve the synchronous behavior of Django and add a layer of asynchronous protocols allowing users to write the views that are entirely synchronous, asynchronous, or a mixture of both . Channels basically allow the application to support “long-running connections”.13 Nis 2021

With WebSockets (via Django Channels) managing the communication between the client and the server, whenever a user is authenticated, an event will be broadcasted to every other connected user . Each user’s screen will change automatically, without them having to reload their browsers.