Question: what are the main benefits of using amazon dynamodb?
Answer: Scalability and Performance. Using Amazon DynamoDB, Developers can combine incremental scalability and high performance with the ease of cloud administration, reliability and table data model and thus can meet the customer demand. ... 
Cross-region Replication. ... 
TTL (Time to Live) ... 
Fine-grained Access Control. ... 
Stream. ... 
Data Model.