In general, however, you will find that following these guidelines will help make your presentations more effective and avoid the common pitfalls that many people experience. There is a LOT of information on this page. I recommend that you read it prior to preparing your presentation and then make your presentation. Next, go back and read this guide again and compare these guidelines with your presentation and make corrections as needed. Following the 5x5 rule is a common practice of professional presenters.
Most beginners like to fill their slides with text.
In general, doing so is a BIG mistake. The bottom line is that the material that you put on your slides should only be your main points and not everything that you want to say. Although everyone breaks the 5x5 rule on occasion, you should take care to make sure that the bulk of your PowerPoint slides fit the rule. In general, if you have more than can be put on these five lines then you should put the additional text on a second or third slide. There are a LOT of reasons for this.