"To use this functionality" means to utilize or operate a specific feature or capability of a system, device, or software in order to perform a particular task or achieve a desired outcome. Full definition
We developed a simple and easy - to - use functionality for messaging, allowing you to browse profiles and communicate with your matches, without being tied to any specific place. (uniformdating.com)
I would honestly recommend not using this functionality because you can get some powerful equipment and stat boosts earlier than you would otherwise and it can make the game a bit easy. (monamiibo.com)
Other aspects of the tablet that only adds to its appeal include speech - to - text feature along with «ready - to - use functionality with 60 plus language boards». (goodereader.com)