The Notes feature of PowerPoint allows you to add additional information about the slide

When you view the presentation in Normal View, you will see a panel below the slide edit area.

Click on the space in the panel to add your notes.

This feature also enables you to create handouts for your audience easily. 

To do this, click on the “Notes page” in the “View” tab. This will show a page 

for each slide with the slide scaled down and your notes below it. You can print 

these pages directly to be distributed as handouts.

 Check out these great presentation templates:

Templates with Premium Images 

Templates with Education Theme 

PowerPoint Templates with People