MongoDB stores data as BSON documents. BSON is a binary representation of JSON documents, though it contains more data types than JSON. Some of the supported data types are: Double, String, Object, Array, Binary Data, RegEx, Boolean, Date, Null, JavaScript, Timestamp. ObjectId.
Some of the features of BSON:
1.BSON is lightweight and is an important feature for any data representation format, especially when used over the network.
2.BSON is designed to be traversed easily.
3.It is efficient. Encoding data to BSON and decoding from BSON can be performed very quickly in most languages
