Sync concepts.adoc

See gh-4611

docs/modules/ROOT/pages/concepts.adoc

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 Micrometer is a metrics instrumentation library for JVM-based applications. It provides a simple facade over the instrumentation clients for the most popular monitoring systems, letting you instrument your JVM-based application code without vendor lock-in. It is designed to add little to no overhead to your metrics collection activity while maximizing the portability of your metrics effort.
 
-Micrometer is _not_ a distributed tracing system or an event logger. In Micrometer 1.10, we do however provide a plugin mechanism that allows you to add capabilities including the tracing features.
+Starting from Micrometer 1.10, Micrometer provides the xref:observation.adoc[Observation API] and a plugin mechanism that allows you to add capabilities including the tracing features. You can read more about tracing in the https://docs.micrometer.io/tracing/reference/[Micrometer Tracing documentation].
 
-// TODO: Link to tracing?
-
-For better understanding the differences among these different types of systems (Metrics, Distributed Tracing, and Logging) we recommend Adrian Cole's talk, titled https://www.dotconferences.com/2017/04/adrian-cole-observability-3-ways-logging-metrics-tracing[Observability 3 Ways].
+For better understanding the differences among these different types of systems (Metrics, Distributed Tracing, and Logging) we recommend Adrian Cole's talk, titled https://www.dotconferences.com/2017/04/adrian-cole-observability-3-ways-logging-metrics-tracing[Observability 3 Ways]. To learn more about Micrometer Observation API we recommend Tommy Ludwig's and Marcin Grzejszczak's talk, titled https://www.youtube.com/watch?v=fh3VbrPvAjg[Observability of Your Application].
 
 [[concepts-dependencies]]
 == Dependencies