Add README.md

README.md

+A JSON web token(JWT) is JSON Object which is used to securely transfer information over the web(between two parties).
+It can be used for an authentication system and can also be used for information exchange.The token is mainly composed of header, payload, signature.
+These three parts are separated by dots(.).
+JWT defines the structure of information we are sending from one party to the another, and it comes in two forms – Serialized, Deserialized.
+The Serialized approach is mainly used to transfer the data through the network with each request and response.
+While the deserialized approach is used to read and write data to the web token.
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