What is the primary step to remove workbook protection to allow adding new worksheets?

To remove workbook protection in order to add new worksheets, the primary step involves utilizing the feature that controls the protection settings of the workbook itself. Clicking the Protect Workbook button is responsible for accessing the necessary options to either protect or unprotect the workbook.

When a workbook is protected, it restricts certain actions, including the addition of new worksheets. Therefore, to make changes and add new worksheets, users can navigate to the Protect Workbook button, which provides the means to adjust this protection level.

While accessing review tab settings does relate to protection features, and selecting unprotect workbook would indeed be necessary after clicking the protect button, the initial action to manage the protection status starts with interacting with the Protect Workbook button. Thus, clicking this button is designated as the primary step in the process.