During the course of a presentation, you need to be aware of how things are going. Are people starting to lose interest? Do they need a break? Do you need to do something different to change the pace?
When it’s time to wrap up your presentation, you need to remind people of your basic message. You hope that a week from now, if someone asked the members of your audience they would be able to recall what your presentation was all about.
This is something that depends greatly upon the audience, but as you have no control over their reactions your job is simply to ensure that you get your message across as persuasively as you possibly can.
You will probably be given an allotted time to deliver your presentation, and it is a good idea to take this time and look at all the elements you need to cover. By doing this you can then divide the allotted time into shorter spells in which you can cover the topics in hand.