The "Undo" function is a helpful tool found in many software applications, allowing users to reverse their last action. For example, if you accidentally delete a sentence while writing in a word processor like Microsoft Word, you can simply click "Undo" to restore it. This feature saves time and reduces frustration, making it easier to correct mistakes. In addition to text editing, "Undo" is also useful in graphic design programs like Adobe Photoshop. If you make an unwanted change to an image, pressing "Undo" can quickly bring back the previous version. This way, users can experiment freely without the fear of permanently altering their work.