Save your presentation file - Microsoft Support

Save your PowerPoint file as one of several formats, to a folder on a local drive, CD, DVD, flash drive, or to your laptop or desktop.

Video: Save a presentation in a different format - Microsoft Support

Record your screen in PowerPoint - Microsoft Support

Can't save comments in PPT? : r/powerpoint

Share your PowerPoint presentation with others - Microsoft Support

Save a copy of your presentation with PowerPoint for the web

How to save a PowerPoint presentation as a video

PowerPoint 2016: Saving Presentations

Can't repair a PowerPoint presentation? Try this - Microsoft

Basic tasks for creating a PowerPoint presentation - Microsoft Support