**SkyWalking** started as a distributed system in 2015. From 5.x, it evolved to the fully functional [Application Performance Management](https://en.wikipedia.org/wiki/Application_performance_management)
**SkyWalking** started as a distributed tracing system in 2015. From 5.x, it evolved to the fully functional [Application Performance Management](https://en.wikipedia.org/wiki/Application_performance_management)
system. It is used for tracing, monitoring, diagnose distributed systems, especially based on microservices, cloud native and container,