GeForce Experience is an application from NVIDIA that optimizes your PC in two key ways.
GeForce Experience automatically notifies you of new NVIDIA drivers and downloads them for you. NVIDIA is constantly working to improve its drivers. New drivers improve game performance, add new features, and fix bugs.
GeForce Experience optimizes graphics settings in your games based on your hardware configuration. NVIDIA performs extensive game testing for various combinations of GPUs, CPUs, and monitor resolutions and stores this information in the NVIDIA cloud. GeForce Experience connects to the NVIDIA Cloud and downloads optimal playable settings (OPS) for your games tailored specifically to your PC.
The result is that your PC is always kept up to date and optimized for the latest games. To utilize optimized PC games on your SHIELD device, you will need to have GeForce Experience installed on your PC.
For GeForce GTX 900 Series GPUs, GeForce Experience adds digital super resolution mode, 4K video recording, wired PC controller support for SHIELD controller, and improved ShadowPlay performance of SLI configurations.
For more information on GeForce Experience, go to http://www.geforce.com/geforce-experience.