The principle of disclosure emphasizes revealing only relevant information as needed. By showing users just what they need to complete their task, you prevent them from feeling overwhelmed and help them make informed decisions on how to proceed. For example, an online shopping site might first show a product's key features and price. If users are interested, they can click to see more details like specifications, customer reviews, and related products. This approach keeps the initial interface clean and simple, helping users focus on what matters most at each stage of their journey.