Assuming you want to become a better API product manager:
The first step is to clearly understand what an API is and does. At a high level, an API is a set of protocols and tools that let one piece of software talk to another. More specifically, an API allows a third party to access your data and functionality in a controlled, secure manner.
As the product manager of an API, it is your job to make sure that the API is designed and built in a way that is both effective and easy to use. In order to do this, you need to have a strong understanding of both the technical aspects of how an API works and the business goals that it is trying to achieve.
Here are a few specific things that you can do to be a good API product manager:
Define the purpose and target audience for your API.
Work with your development team to come up with an effective API design.
Create clear and concise documentation for your API.
Promote your API to its target audience.
Monitor usage statistics and feedback to continuously improve your API.