Transitions can make your presentation more dynamic and visually engaging. Google Slides makes it easy to add transitions with just a few clicks, creating a smoother flow between slides.

Working Mac Improve your presentation skills: how to make smoother slide transitions in Keynote Working Mac By Joe Kissell, AUG 3, 2014 8:46 pm PDT ...

CSS 3 transitions work in any modern browser. For browsers that don't understand transitions (I'm looking at you IE 9) you'll need to fallback to JavaScript.