To improve developer experience and streamline workflows, organizations are building internal developer platforms (IDPs) and leveraging value stream management tools, including service catalogs. A service catalog represents the services available within a development environment, providing a central platform that acts as a single source of truth. In contrast, an IDP allows developers to build, deploy, and operate applications across their entire life cycle. Both components are vital in modern software engineering, where individual apps consume 25 times more components than 10 years ago. Service catalogs exist as a component of an IDP, providing additional functionality and improving the developer experience by forcing developers to think about what services they're using in their workflow. By using a service catalog within an IDP, organizations can create a joint business and development view of a product, understand how different elements are connected together, and analyze data to improve transparency and continuously optimize the software engineering process.