alias

[Matthew Ngaha]

hi all, i just had a quick question about this example.
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http {
   server {
       server_name localhost;
       root /var/www/website.com/html;
        location /admin/ {
        alias /var/www/locked/;
      }
   }
}
When a request for http://localhost/ is received, files are served from the
/var/www/website.com/html/ folder. However, if Nginx receives a request for
http://localhost/admin/, the path used to retrieve the files is /home/website.
com/locked/.
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my question is about the alias variable inside the location /admin/ {}
block. It clearly shows /var/www/locked/ as its path, but when
explained below, it says the path is /home/website.com/locked/..

Please can someone tell me how:
/home/website.com/locked/   ==   /var/www/locked/ ??
I'm new to linux so maybe it's something i'm unaware of.

also the path having website.com in it. Does this mean a directory was
named website.com, with the period?