Any relational database has a typical schema design that shows the number of tables and the relationship between those tables. Whereas in MongoDB, there is no concept of relationship.
Less Schema − MongoDB is a document database where one collection contains different documents. The number of fields, content, and document size may vary from one document to another.
The structure of one object is clear.
There are no complicated connections.
Deep query capability. MongoDB supports dynamic document queries using a document-based query language almost as powerful as SQL.
Easy to scale − MongoDB is easy to scale.
No conversion/mapping of application objects to database objects is required.
Uses internal memory to store the (windowed) working set, allowing faster data access.
Document Oriented Storage − Data is stored in the form of JSON style documents.
Index on any attribute
Replication and High Availability
Fast in-place updates
MongoDB professional support