The (e.g., corporate, students, wedding guests) Any brand colors or themes you need to include
A busy background kills text. You must add a veil. how to make a slideshow background
Drop the opacity to 20-40% so it doesn't overwhelm the slide. The (e
Depending on your platform, here is how to execute it: how to make a slideshow background
Use dark backgrounds for light text and vice-versa.
If using a photo, apply a slight blur to keep the focus on the words.