Whenever you are teaching a class or giving a presentation, it is important to know who your audience is. If you do not know your audience, you can make mistakes that will reduce the effectiveness of your presentation.
In this scenario, we know that our audience is made up of relatively young adults. This is important for a variety of reasons. For one example, it tells us something about what we can expect them to know about things like computers and electronic technologies. A group that is 55 and older might not be nearly as attuned to electronic devices and the things that can be done with them.
Of course, you should not completely change your approach just because you have a different audience. You still need to cover the important material. You still have to approach things professionally so that you make a good impression. However, you can make some changes in your presentation if you know the age of your audience. You can change the sorts of cultural references you might make. You can do more things with interactive technology since you can assume that everyone has a smart phone and knows how to use it. In short, you can make relatively minor adjustments that will cater to your audience without changing the basic foundations of your presentation.