Midjourney Prompt Builder is an AI tool that allows users to create personalized prompts for a customized journey. With the ability to generate prompts based on various content, styles, looks, types of shots, and settings, users can take control of their experience by selecting specific elements they prefer. The tool offers options for content in either .jpg or .png format, with the ability to choose from different styles such as cartoon or high-quality photo looks. It also provides options for different types of shots, settings, aspect ratios, and seed values for consistency. Users can balance the weights of their prompts and consider adding a seed to further refine their experience. Potential applications of this tool include creating unique prompts for creative projects, designing personalized visual content, or tailoring prompts for interactive storytelling experiences.