When your presentation is something you deliver, it rarely matters if you have any content invisible to your audiences, such as your slide notes, comments, and document properties. Typically, none of these are visible to your audience, and you are free to add any information in these areas that will enable you to be better prepared to deliver your slides. However, if you need to share the same PowerPoint presentation with colleagues, or even publish it online, the scenario will be different. Most users don’t even think twice about all this information simply due to lack of awareness. They should because most of this content may include hidden data or information that you or your company may not want to share.