After everything has been inspected and the excess data has been removed, you can protect the presentation. Adding protection marks the presentation as final, letting other users know that further edits aren't needed.
Click the File tab.
Click the Protect Presentation button on the Info tab.
Click Mark as Final.
When a presentation is marked as final, the ribbon is hidden from view. Typing, editing, and proofing are disabled to discourage editing. However, clicking the Edit Anyway button removes the restrictions and allows editing once again.