"Ctrl + S" is a keyboard shortcut commonly used in various software applications to save the current document or file. By pressing these two keys simultaneously, users can quickly store their work without navigating through menus. This function is essential for preventing data loss, especially during long editing sessions. This shortcut is widely recognized across many programs, including Microsoft Word, Adobe Photoshop, and Google Docs. Regularly using "Ctrl + S" helps ensure that changes are saved frequently, making it a best practice for anyone working on digital projects.