This is just a shortcut to Chrome™ Settings page, nothing more. When installed, it will add "Settings" icon to your Apps list (you know, when you click 'Apps" on the New Tab page;)
When you click the "Settings" shortcut, it will open the chrome://settings page. Thats all this "app" does.
Get it on Chrome Web Store »
After installing the settings button you will find the shortcut among the other Apps (New Tab | Apps) or inside the Chrome App Launcher (unfortunately Chrome App Launcher is only available on Chrome OS devices). This is the icon:
To add the button -- visit the listing in the web store and click the "install" button.
If you want to remove it in future -- just right-click on the icon and select "Remove from Chrome..." (By the way this is the standard way to uninstall any Chrome app or extension)