AWS's fully managed NoSQL database. It delivers single-digit-millisecond latency at any scale, with automatic throughput and storage scaling. It supports key-value and document data models.
On CLF-C02 this is the NoSQL database example. SAA-C03 goes deeper into secondary indexes, DynamoDB Streams, and DAX (caching). Question: database for millions of users with <10ms latency → DynamoDB.
Amazon DynamoDB is a concept that can show up on the exam. Check the full guide to see it in context.