You are almost done with DynamoDB now and this will be the last topic of the book, so here as a best use case I am providing you with a recap of the basics for DynamoDB.
When key-value or simple queries are present
When a very high read/write rate is needed
When auto-sharding is required
When auto-scaling is required
When low latency is required
When there is no size or throughput limit
When there is no tuning
When high durability is required