Self-confidence will allow you to be able to do many of the “things to do” such as speaking loudly and clearly, maintaining positive body language and so on, a lot also depends on preparation and from knowledge about the topic, this will help the speaker in many ways, for example he will be able to answer questions from the audience in a simple and more informative way and most importantly, it will help the speaker not to read the slides. It's possible to develop good presentation skills and I think anyone who's going to give a presentation certainly just needs to follow the do's and