App Studio, notification functionally?

Hello Everyone,

We recently published a custom app (created through App Studio, Create a new app) in Teams with the ability to show an internal SharePoint page (Personal tab).

I'm wondering what the most user friendly way is to notify employees in Teams of a change on the internal SharePoint page. Can this be accomplished by adding a kind of chat functionality to the custom app; or do we need to set up a company wide Teams Channel? I personally prefer the first option, a chat functionality added to the custom app; however I'm not sure if this is possible. 

Thank you for your professional insight.