Either you intend to prevent data removal by someone else or wish to ensure that the content remains the same while being passed to several persons.
You often keep your Excel worksheet as a ‘read-only’ file for security reasons. Unlocking a ‘Read-Only’ Excel File on Windows PC.Unlocking a ‘Read-Only’ Excel File by Modifying ‘Permissions’ on Mac.Unlocking a ‘Read-Only’ Excel File on Mac.Undoing ‘Read-Only’ from Password-Protected Excel Files.