At any given moment, what should be on the screen is the thing you’re talking about. Our audience will almost instantly read every slide as soon as it’s displayed; if you have the next four points you plan to make up there, they’ll be three steps ahead of you, waiting for you to catch up rather than listening with interest to the point you’re making.
Plan your presentation so just one new point is displayed at any given moment. Bullet points can be revealed one at a time as you reach them. Charts can be put on the next slide to be referenced when you get to the data the chart displays. Your job as presenter is to control the flow of information so that you and your audience stay in sync.