Modern, distributed applications are often seen as a graph of nodes and edges, each node representing a container, a function, or an API service. At scale, with thousands of small microservices visualizing and analyzing becomes critical to understand performance, flow, and the health of our applications. To accomplish that we need to learn about observability, distributed tracing, popular tools and frameworks, and more. In this talk, we’ll go over the challenges, the solutions, the approaches, and the tools to help you understand your APIs and microservices.