Defining an ideal customer profile is crucial for creating a demand generation strategy that constantly generates demand among the target audience, while measuring activities towards desired success criteria. Understanding the needs of a diverse audience is as important as speaking their language to create a phenomenal API experience. To measure developer experience with an API, tools like APIMatic.io's "Developer Experience Analytics" provide novel metrics such as time to first API call, API portal visits, portal page views, and API code playground calls, which help identify the success of an API by analyzing its onboarding process, popularity of languages, importance of endpoints, and potential issues in documentation or understanding. These metrics enable developers to create a better experience for users, ultimately leading to increased adoption and revenue streams.