Ease of use. It has a lot of relevant templates. Can pick up templates based on one's need - fundraising, sales, etc. It has a lot of other features which make creating and editing slides a breeze.

I use this tool for both work and school; it's excellent at pulling together beautiful presentations without worrying about the small formating details that can be frustrating on PowerPoint.

The main benefit is that "designers" like me cannot make ugly-looking slides as I used to do in almost every presentation. Professional-looking decks without a designer.