The keyboard shortcut "Ctrl + Q" is commonly used in various software applications to perform specific functions. In many programs, it is utilized to quickly quit or close the application. This can help users save time by avoiding the need to navigate through menus to exit a program. In some text editors and integrated development environments (IDEs), such as Visual Studio Code or Sublime Text, "Ctrl + Q" may also be assigned to other functions, like toggling a sidebar or quick access menu. Users can customize these shortcuts based on their preferences, enhancing their workflow efficiency.