I recently thought to myself why certain websites have very unique domain names. Is it possible for a website to have for example www.aboutus.example.com instead of www.example.com/aboutus ?Like for Stack Exchange, it has many different domain names? Is that what it's called? Domain names?For example: http://android.stackexchange.com/http://webmasters.stackexchange.com/http://gamedev.stackexchange.com/So if I want my website to have quite a few pages, can I actually create a website withwww.aboutus.example.comwww.home.example.comwww.contactus.example.comWhat is this actually called and is it possible?
Domain name explanations
domains;subdomain;domain registration;multiple domains