Why would anyone want to password protect their PowerPoint presentations? There are many reasons, and here are some of them. A presentation with confidential content is safe if it is password protected — nobody without access to the password can open it. Also, the password protected presentation is more safer to share — you can provide the password to the person whom you are sharing the presentation with. In addition to providing a password-to-open option, PowerPoint provides a less restrictive password-to-modify option. So your presentation can be opened by anybody, but can’t be modified – this makes your content non editable.