The "Start button" is a key feature in many computer operating systems, particularly in Microsoft Windows. It serves as a central hub for accessing programs, settings, and files. Users can click the button to open a menu that displays various options, making it easier to navigate the system. Typically located in the lower-left corner of the screen, the Start button has evolved over the years. It allows users to quickly launch applications, search for documents, and access system settings. The design and functionality may vary between different versions of Windows, but its purpose remains consistent: to enhance user experience and efficiency.