To view changes made to Smartsheet items, you can look at cell history, add system time-based columns, or view the Activity Log.
USM Content
Cell history
Anyone with Viewer or higher permissions can access cell history.
Right-click a cell and select View Cell History to see a log of changes made at the cell level, who made the changes, and when they happened. You can copy information from the View Cell History pop-up and paste it back into the cell as needed.
System columns
Create Modified (Date) and Modified By columns to show the time each row was last edited as well as the collaborator who changed each row in the sheet. For more information, see Column type reference.
Activity log
To see the Activity log, you must be a paid user in a Business or Enterprise plan.
Select the Activity Log icon on the right feature bar to see a list of all changes made to an item, who made them, and when they happened. This includes changes such as row deletion (with deleted data), who has viewed the item, and sharing permission changes.
You can filter and export the Activity Log. Learn more in Track the history of changes with Activity Log.