The storyboarding phase of digital storytelling usually comes after a first draft of the script is finished, though some producers script and storyboard their projects at the same time.
Storyboards offer the opportunity to create a visual representative of your project, which is particularly useful when it comes to deciding which image or video accompanies each line of narrative.
On the right side of this page is an example of a PBS NC storyboard, used for an animation on sustatinable water. You can download and print out a storyboard template here.