A Live Style Guide developer creates and maintains a dynamic visual guide to a brand's or project's design elements. They standardize the visual language, including typography, color schemes, layout, and UI components. This guide serves as a reference for all team members, ensuring consistency in design across different platforms and projects. The developer updates the guide as designs evolve, making it 'live'. They often use HTML, CSS and JavaScript to create this interactive guide. Their work supports designers, developers, and stakeholders, ensuring everyone has a clear understanding of the design philosophy and guidelines.