Don’t repeat what is written on your slides
It’s painful when a speaker reads verbatim what is written on each slide. Give your audience some credit, they’re going to be pretty good readers so you don’t need to help them out. Your job is to give context and detail to the one or two lines (at the most) on a slide. Or in some instances, vice versa; I often use slides to add a quick parenthetical note to something I’m saying to the audience.