How to Protect a Worksheet

Excel Tutorials

Protecting Worksheets

In Microsoft Excel, you can protect Worksheets for sharing. This means when you share your spreadsheet with other people, they can not edit that protected sheet. It also protects your worksheet from you, making sure you don't accidentally delete any important data.
Excel Protecting Sheet Tutorial

Google Sheets

You can protect a area in Google Sheets, but you can not set a password and the Sheet will just send you a warning when you are about to edit a cell.