Explore the essentials and advanced features of Akka Streams, an implementation of the Reactive Streams specification, in this 42-minute conference talk from Scala Days Copenhagen 2017. Dive into stream processing concepts through live coding demonstrations, covering topics such as materialized values, cyclic graphs, and the Flow API. Learn how to work with Akka HTTP, create graphs, and implement event sources. Gain practical insights into Reactive Streams and stream processing topology without the use of slides, focusing instead on hands-on coding examples and live demos. Discover the power of Akka Streams for efficient and scalable stream processing in Scala.