Cloud Print is a tool that you can use it to connect your smartphone to a printer shared using the Google Cloud Print platform. Thanks to it you gain the ability of sending files for printing from anywhere in the World and you don't even have to use a computer or laptop. Inside the user interface you will find a basic design and a list of available printers.
You are allowed to print photos from your Gallery and even to keep track of your print jobs. In case you have printers supported by this platform inside your local network, with the help of this tool you can detect them and register. You have to keep in mind that not all models come with support for local discovery and you will have to check the manual of that specific printer for more information.