Windows Magnifier is an accessibility tool included in the Windows operating system. It allows users to zoom in on parts of the screen, making text and images easier to see. This feature is particularly helpful for individuals with visual impairments or those who need to read small text. Users can activate Windows Magnifier by pressing the Windows key and the plus (+) key together. The tool offers different zoom levels and can be set to follow the mouse cursor or the keyboard focus. It can be used in full-screen mode, lens mode, or docked mode, providing flexibility based on user preferences.