Welcome! This content is for anyone who works in Excel files that other people also need to view or edit, whether that is a shared budget tracker, a team project plan, or a recurring report. You will move away from emailing spreadsheets back and forth and instead share one live workbook, work in it alongside teammates in real time, and talk through changes with comments and @mentions right inside the file.

You will also build a safety net for that shared work. You will learn to open version history to see earlier states of a workbook and recover from a mistake, and you will apply sheet and workbook protection so approved formulas and structure stay safe while collaborators keep working freely in the cells that are meant to be edited.