A fashion model posed on a treadmill makes no sense, and that is the point. The image is itself a piece of art direction, so the packaging proves the exact skill it teaches. The creator's baffled face gives you permission to find it strange.
How the packaging works
Title
The title names the audience and the skill, a creative's guide to art direction.
Thumbnail
The thumbnail stages a deliberately clashing image that shows the skill in action.
Remix this
If you teach a visual skill, make the thumbnail a demonstration of it rather than a description. An image doing the thing beats text saying you can do the thing.