Final answer:
The Developer Portal in APIM serves as a central interface where developers can discover, understand, test, and subscribe to APIs, obtain API keys, and monitor API usage.
Step-by-step explanation:
The Developer Portal in the context of API Management (APIM) is a centralized web interface that allows developers to discover APIs, understand their functionality, and subscribe to them. Within the portal, developers can access API documentation, test APIs, obtain API keys, and get insights about API usage. Essentially, the Developer Portal serves as a bridge between API publishers and developers, enabling a smooth process for integrating APIs into applications and services.