This new privacy feature in Windows 11 claims to have multiple benefits

Microsoft is working on a new feature for Windows 11, designed to improve user privacy and device performance. The feature is called “Presence sensing” and works by allowing users to control whether or not apps can sense their presence on the device. 

As explained in the API documentation for the feature, Presence sensing “represents a sensor that detects whether a user is present, absent, or not interacting with their device.” 

Source