Movement can be added to a PowerPoint presentation with transitions to add a special effect  to introduce a slide. For example, you can fade in from black or dissolve from one slide to another. You can choose the transitions you want, and you can vary the speed of each.  Do not add a transition to the first slide as it should be visible before the presentation begins, to focus the audience on the forthcoming presentation.  

On the menu bar click View, then 

Click on Slide Sorter

. 

Select the slide or slides you want to add a transition to. To select more than one slide, press the Ctrl button on the keyboard while clicking on the slides with the mouse.

In the illustrated example the transition is between Slide 1 and Slide 2 in the Slide Sorter View.  On the small down arrow , open the box to select the transition you want.  Repeat the process for each slide you want to add a transition to. 

Or  

In the menu bar

Click on Slide Show, then

Click on Slide Transition. 

In the Effect box, click the transition you want, and then select any other options you want. To apply the transition to the selected slide:

Click Apply.

To apply the transition to all the slides:

Click Apply to All. 

To view the transitions:

Click Slide Show, then

Click on View Show