The main points are the backbone of your talk. They play an important role in helping you prioritise, focus and sequence your information. When planning your presentation you should put aside your research notes and produce a list or summary of the main points that you would like to make, expressing each in a few words or a short sentence. Ask yourself: "what am I really telling them? What should they be learning here?". Your answers to these questions will help you communicate clear and effective messages to your audience.
After you have identified your main points, you should embellish them with supporting information. For example, add clarity to your argument through the use of diagrams, illustrate a link between theory and practice, or substantiate your claims with appropriate data. Use the supporting information to add colour and interest to your talk, but avoid detracting from the clarity of your main points by overburdening them with too much detail.