A Document Store is a type of database designed to store, retrieve, and manage semi-structured data in the form of documents. These documents are typically formatted in JSON, XML, or BSON, allowing for flexible data structures. This flexibility makes Document Stores ideal for applications that require rapid development and frequent changes to data models. Unlike traditional relational databases, which use tables and rows, Document Stores organize data as collections of documents. Each document can have a unique structure, enabling developers to store complex data types without predefined schemas. Popular examples of Document Stores include MongoDB and CouchDB.