Like any other plugin that created for the work in worldpress, plugin push.world can be set up like all others.
Then follow in your wordpress: enter in your account in the left menu and chose "Plugins — Add new".
In opened form find our plugin — tupe in Push.World
Wait till the end of Installation.
Press "Activate" so the plugin will start working.
After activation, you'll see Push.World plugin in the left menu. Click on it and continue.
Plugin settings are easy. In appeared window copy paste code from push.world registration master.
Then click "Save changes" and complete the work of push.world master.
Done! Push notifications is now installed on your wordpress website.