To view the speaker's notes on a computer select open in v to open the pull down menu, then select Powerpoint for the web.
After selecting the Notes icon, the speaker's notes appear along with the slides.
To view the speaker's Notes on a smartphone, first install the Microsoft Powerpoint app.
Download the Powerpoint slide deck (.ppt file) you to wish to view.
Open the .ppt file with the app and select the Notes icon to view the speaker's notes with the slides.