It’s included in Office 365. When you subscribe, or if you have already, to Office 365, Microsoft Powerpoint is included in that subscription and requires no additional fees plus you have access to dozens of other Microsoft programs!
Mobile App. It allows you to view, edit and create your virtual tour from any device, anywhere and at any time.
Sync. Your presentation is saved to an online drive so anyone with a link to your presentation can edit or view without needing your device. This makes it incredibly convenient if you are collaborating with another person.