Use the Action button to create interactivity in presentations. You’ll find the Action button in the Links group on the Insert tab.
For example, create a Hyperlink to Slide action to a particular slide that may not necessarily be in the order you assembled your presentation (great for reference screenshots). Then on the target slide, create a Hyperlink to Last Slide Viewed action to return to whatever slide you were on last. Actions must be attached to objects, such as shapes. Some shapes already have the Hyperlink to option in their properties.