Why does Ruby on Rails use http://0.0.0.0:3000 instead of http://localhost:3000?

Question

I am very new to Ruby on Rails so when I tried to follow the official \"Getting Started\" ruby on rails tutorial, I was a bit disappointed

Answer 1

Just so everyone knows, my firefox browser correctly displays the locally hosted server if I access http://localhost:3000/ but it does NOT display when I attempt to access http://0.0.0.0:3000/ as recommended by Ruby. Clearly, in some sense, they are not equivalent.

I'm on Windows btw.