What does "webroot" mean?
In Mpc, "webroot" refers to the root folder of your domain. Technically, this is called the "DocumentRoot" of your domain. This folder is usually named "public_html", but in some servers "www" or "html".
In a sub-domain (like "test.example.com"), the webroot folder is usually named "test.example.com".
When Mpc builds a Project, all pages are written to the webroot folder. So a page with an Mpc url of "state/city/keyword.php" would be written to the webroot. To the world, the url would be "https://example.com/state/city/keyword.php"