A website is a informational page containing all the information on what the website is intended to run on internet.
A web application is a web site that does something other than display content to the masses. It’s intended for user interactions and transactions, performing actual business functions, and not simply displaying information to a user.
web application can be presented a website or just a part of a website. note that not all websites are web applications
eg: web applications are Google( as a search engine app), Facebook (as a social media app), Youtube ( as a web based video streaming app)