A writing prompt is a phrase, theme, scenario, action, etc., which is used to inspire a writer to develop a story line. Quote inspired prompt: A famous (or not so famous) quotation as a prompt. Media Prompt: Media, other than images, as prompts (videos, gifs, etc). Constrained Writing: If the replies are sought with constraints on the writing. Looking to add depth to your story and cast? Brainstorm with the idea generator and add richness to your characters, plan backstory events, create intensity through conflict, and uproot any writer's block that's keeping you from putting words on the page..