DynamoDB is a Fast, flexible NoSQL database service for single-digit millisecond performance at any scale.
With Amazon DynamoDB there is no need provisioning physical servers to handle your Database, because it is a serverless database that allows users and organizations to focus on innovation whilst optimizing costs.
Reference: https://aws.amazon.com/dynamodb/
With it's key value attribute, you can add various attributes and this unique ID's allows for easy identification and avoid errors within the database.
It supports a wide range of data types, from Number Strings, Lists, Boolean etc.
A table is also created to house every data, and it also allows for other activities to be performed or when there is need to update the items in the table.
Querying information within the database in real time with IDs, and specific values allowing for peformance and scalability.
Reference: https://www.amazonaws.cn/en/dynamodb/