If you need to give the same presentation to different groups of people but not all of the slides apply to each group you can create different slide shows using the same presentation.
A lot of users save more than one copy of a presentation where each version contains slight changes to allow for "customisation" for multiple audiences.
From the main presentation a user can select the slides they want in their slide show.
To create a custom slide show select (Slide Show > Custom Shows)
Click the New button and enter the name for the show.
Add the slides for this presentation and arrange them in the necessary order and select OK
To run a custom show select the presentation and click Show.