Tables, Items, and Attributes are the core components.

▪ Uses primary keys and secondary indexes to uniquely

identify each item in a table for greater query flexibility.

▪ Tables

DynamoDB stores data in tables. A table is a collection

of data items. For example, see the sample table

People.

▪ Items

Each table contains zero or more items. An item is a set

of attributes that can be uniquely identified among all of

the other items.

▪ Attributes

Each item is composed of one or more attributes. An

attribute is a fundamental data element.

https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.html