The task is to make a screen sharing app with a chat functionality.
It is to be a client-server application, where the Host exposes its screen and plays as a chat server, and the Client is a web application that shows what the server exposes and also allows to send/receive short messages.
The exact feature list and UI is up to you to decide, minimal requirements would be:
* multiple simultaneous clients * still picture of the screen, that is updated periodically * a single global "chat room" accessible without authentication * newly connected clients are not required to receive any chat history * host is to know how many clients are connected
Consider this as a real open source project you'd publish. Think of MVP and invest in quality rather than additional functionality. A product should be seen as something that is a pleasure to use.