Structured data, or structured data markup, is a way to help search engines understand what your webpage is about. By using schema markup you can make your content stand out in search results with eye-catching features like star ratings and prices. This not only boosts visibility but also improves click-through rates, making it easier for users to find the info they need quickly. In short, adding structured data makes your site more appealing and helps search engines get what you’re all about.