Visual stories have structure. They have beginnings, middles, and ends. They are about people – or at least humanistic souls – and they argue for a theme, or a moral, or a point by adhering to this structure.
Visual storytelling isn’t using an image of a diamond ring with the tagline, A Diamond Is Forever:
That is a marketing visual. It is designed to create attention with images and words. While you might not use a sparkling rock, you probably use images most often as a complementary tool in your blogs, slide decks, e-books, etc. You use images to break up copy, to get your content noticed.