This document discusses AWS Kinesis Streams, which allows users to build applications that process or analyze streaming data. Kinesis Streams partitions incoming data records into shards, with each shard providing a fixed unit of capacity able to ingest up to 1MB/sec of data up to 1000 records/sec. The document provides an overview of key concepts like streams, data records, partition keys, and shards. It also cautions that there are consequences to the limits imposed by the number of shards and consumers that must be understood to use Kinesis Streams effectively.