Using this tag you can set up your web app to have an application shortcut icon added to a device's homescreen, and have the app launch in full-screen "app mode".
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
Website using the € symbol on their website - meaning it may accept payment in Euros.
Chrome for Android, since version 39 supports the "theme-color" meta tag to allow websites control the background color of the tab's UI header.