While it's crystal clear what a website is I am still confused about the use (and misuse) of the web app label.
What is to you a web app? What are the peculiar differences versus a website?
The word app it makes one think of a mobile app, so you'd expect from a web app to be as much as similar to a mobile app, not just by its appearance but mainly from an architecture perspective.
So why would you call it web app if it's still just a server-rendered website that perhaps just stay on the same page URL?
What are your thoughts about this?