It is true that both pictures and words are important, and they both play complementary roles. If you had to choose just one of them, then you could use pictures because the presenter can always use words to explain what the picture represents. Presentations, by their very nature, are meant to be visual in nature. Text and speaking are important too, but you can be more effectively heard and remembered if your content includes pictures.
Learn how to insert pictures in PowerPoint 2013 for Windows.

