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Exam 77-422: Microsoft PowerPoint 2013
4.0 Apply Transitions and Animations
4.1 Apply Transitioning Between Slides: Modify Transition Effects (Advance Slide Manually)

Timing is Everything...   

7. Try it: Review the Advance Options

By default, PowerPoint will Advance, or go to the next slide when the presenter clicks any key on the keyboard or mouse. This option is called On Mouse Click.

 

The slides advance at the presenter's discretion. This option allows the presenter to say all of the information that goes with this slide. The presenter can go faster or slower, depending on the time allocated for her show.

 
Keep going...

Transitions ->Timing->Advance Slide->On Mouse Click