A storyboard is a short synopsis of a film or video production. It includes visuals and the narration script. It is used to describe a film or video production in an inexpensive way.
The best way to construct a storyboard is to have images on the left side and the narration on the right side. On the left side you describe what the camera does or sees. You would want to note as much technical information as needed for your downline personel. In case the producer, director, cameraman or editor are different people. I like to include camera position and size along with the subject matter included in the scene.
On the right side you include the narration to be spoken. This can help significanlty in keeping all the crew on the same page as well as identifying locations and what scene the narration belongs to. Great for tweaking in the edit session.
Keep in mind that a storyboard is intended as a pre-production tool and not necessarily a cut sheet for the post production edit. However, as a template this document can be repurposed to be used as a voice over script, a shot sheet, an editors cut sheet and a note taking platform.
Here is a word document template I put together that you can use if you like. Feel free to use it for your own productions.