A high-fidelity prototype is an advanced, interactive representation of a digital product that closely resembles the final product in terms of design, functionality, and user experience. It typically includes detailed visual elements, such as accurate graphics, colors, and typography, as well as interactive features like clickable buttons, forms, and animations. High-fidelity prototypes allow stakeholders to experience the product's look and feel in a realistic manner, enabling thorough user testing, feedback collection, and validation of design decisions before investing in full-scale development.