Microservices are complex, distributed systems. Microservice implementation is the backbone of any modern IT business. Understanding the internals of the services along with their interactions and behaviors will help you make the overall business more flexible and agile. The performance, availability, scale, and security of microservices can directly affect a business and also its revenue. Hence, monitoring microservices is vital. It helps us observe and manage the quality of the service attributes. Let's discuss the scenarios where it is required.