MongoDB is a document-oriented NoSQL database that stores data in flexible, JSON-like BSON documents organized into collections. This structure suits semistructured data such as product reviews. section 3.6.1
Documents can keep related data, such as reviews, alongside a product. MongoDB does not provide relational tables, relationships, or foreign-key constraints, so tracking relationships across entities can be difficult. Its data shape can also reduce the gap between stored data and application objects. section 3.6.1
Product reviews
An online shop can store product reviews in the same document as the product they describe. section 3.6.1






