There are a lot of comments about hiding the URL "because the user doesn't understand" -- has there been any research into user education directly in the addres

There are a lot of comments about hiding the URL "because the user doesn't understand" -- has there been any research into user education directly in the address bar? Like, fresh install page points @ google.com. Why not A little browser popup highlighting the parts of the URL and explaining it, with a link + tutorial on how to understand parts of the URL? Rather than dumbing the interface down, why not inform users so they can use these platforms more effectively?