the `www` in changing permissions command

I’m following this tutorial to setup wordpress with nginx At one point it asks us to create and cd into a directory /var/www/

cd /var/www/

It subsequently tells us to change the permissions for that directory with this command

sudo chown www-data:www-data * -R sudo usermod -a -G www-data username

My question is this, is there a relationship between the www of the /var/www/ and the www of the www-data:www-data. For example, if I didn’t create the directory /var/www/ but instead created /var/foo/ directory, would the command for changing permissions look like this

sudo chown foo-data:foo-data * -R

or will the command always be

sudo chown www-data:www-data * -R

regardless of what I name the directory?

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<b>“My question is this, is there a relationship between the www of the /var/www/ and the www of the www-data:www-data.”</b> <br> <br>None; <code>www-data</code> is the system name for the web server (whether Nginx or Apache). A popular root directory for a web server – other than <code>/var/www</code> – is <code>/srv/www</code>.