Snap Camera is a software application created by Snap Inc. (the makers of Snapchat) that enables you to apply Snapchat-style filters (called Lenses) to your webcam video feed on Windows and Mac. The software allows you to use these filters in real-time for streaming, video calls, and recording content in apps like Zoom, Skype, OBS Studio, Twitch, and others. While Snap Camera itself is the software, the term "Snap Camera Windows driver" typically refers to the necessary drivers and software that enable your webcam to be used with Snap Camera on Windows.