The StepZen plugin enables developers to build a unified GraphQL API that combines data from multiple sources into a single endpoint, making it easier to power dynamic applications on the Jamstack. With StepZen, developers can unify data from various backends, such as REST APIs, databases, and cloud services, into a single query, unlocking faster delivery of experiences. The plugin is designed to be used with Netlify builds, allowing developers to deploy their unified GraphQL endpoint seamlessly within their build process.