NVIDIA GeForce Now is a cloud gaming service that allows users to play video games on various devices without needing high-end hardware. Instead of running games locally, it streams gameplay from powerful servers, enabling players to access their game libraries from platforms like Steam and Epic Games Store. The service supports a wide range of devices, including PCs, Macs, and mobile devices, making gaming more accessible. Users can choose from different subscription tiers, which offer varying levels of performance and access to features like ray tracing and higher resolutions.