These days, it is fashionable to use slides with lots of images and little text. Though it is fashionable, it is not always effective, because visual learners will understand/remember your points better if they can read the words.
For presentations that you won’t deliver in person, this is especially important. Even though you will be recording audio over your slides for your final presentation, you can’t be sure that people will take the time to listen. So, can your slides stand on their own, without your voice-over, and still communicate effectively? That’s quite challenging, but feasible. Here is an example that accomplishes that: