The document discusses creating a fast data pipeline using Apache Spark's Structured Streaming and Spark Streaming. It presents a sensor anomaly detection pipeline that uses Structured Streaming for data exploration, preparation, and anomaly detection, and Spark Streaming for online model creation and training. It compares the execution and abstraction models of Structured Streaming and Spark Streaming, and demonstrates how to build the sensor anomaly detection pipeline using Kafka sources and sinks with SQL operations, event time windows, and watermarks.