Spring Batch is a framework for writing batch processing applications. It provides reusable functions for processing large volumes of records, including logging, transactions, restarts and resource management. A typical batch job reads data, processes it, and writes the results. It supports various processing strategies like normal processing, concurrent processing, parallel processing and partitioning. The core components are jobs made up of steps, which use readers, processors and writers to operate on chunks of data in a configurable flow.