JSON is built on two structures:
- A collection of name/value pairs. In various languages, this is realized as an object, record, struct, dictionary, hash table, keyed list, or associative array.
- An ordered list of values. In most languages, this is realized as an array, vector, list, or sequence.
JSON format is often used for serializing and transmitting structured data over a network connection
It can be seen in,
- web services responses
- when using Ajax