The "Undo Function" is a feature commonly found in software applications that allows users to reverse their last action. This can be particularly useful in programs like word processors, graphic design software, and spreadsheets, where mistakes can easily occur. By pressing a specific key combination, such as Ctrl + Z on Windows or Command + Z on Mac, users can quickly restore their previous state. This function enhances user experience by providing a safety net, encouraging experimentation without the fear of making irreversible changes. The Undo Function typically works in a sequential manner, allowing users to step back through multiple actions if needed.