The following are some of the important features of DynamoDB:

• DynamoDB is a fully managed NoSQL database service. There are no servers to manage.
• DynamoDB has the characteristics of both the key-value and the document-based NoSQL families. 
• Virtually no limit on throughput or storage. It scales very well, but according to the provisioned throughout configuration. 
• DynamoDB replicates data into three different facilities within the same region for availability and fault tolerance. You can also set up cross-region replication manually.
• It supports eventual consistency reads as well as strongly consistent reads.
• DynamoDB is schemaless at the table level. Each item (rows) can have a different set of elements. Even the same attribute name can be associated with different types in different items.
• DynamoDB automatically partitions and re-partitions data as the table grows in size.
• You can store JSON and then do nested queries on that data using the AWS SDK.

• Data is stored on SSD storage.
• DynamoDB supports atomic updates and atomic counters.
• DynamoDB supports conditional operations for put, update, and delete.