Summary

At this point, you know what it means to observe API behavior. You can identify the different metrics that are important to consider while doing API usage analysis. You also learned that while it’s important to understand user behavior, knowing what happens on your backend system is fundamental. You know how to use APM as your ally to understand how to mitigate problems even before users report them. Speaking of users, you also now know the importance of user feedback and how it can help you maintain a high-quality API product.

You started by learning all about API usage analytics, including the most important metrics to explore. You learned what time to first request is and how it reflects the user experience. You also learned about other metrics such as usage volume and patterns, number of errors, rate-limiting violations, and performance. You then got into the topic of application performance monitoring and learned how you can use it to capture metrics that are...