Nowadays, we gather more and more data, which has to be aggregated, processed, and stored somewhere. This implies using services that can handle increasing loads, scale to growing demands, and offer the smallest latency available. All these requirements are often mentioned when building so-called big data pipelines—parts of a system designed to process as much data as possible, so it is later accessible by tools such as Hadoop, Spark, ML, AI, and so on. If you are looking for a service in Azure that can handle millions of messages per second, Azure Event Hub is the right choice. In this chapter, you will learn the basics of this Azure component and get familiar with messaging solutions in Azure.