Storybird is an online platform that allows users to create stories and poems by combining images with creative writing. It encourages the development of writing skills like using figurative language, point of view, and word choice. The document discusses how Storybird can impact 21st century learners by enabling students to publish and share their work, see other writers' work, revise their writing digitally, and create stories using images on a computer rather than with pencil and paper.