What is the use of authorization in Postman App and why do we use OAuth-2 only?

OAuth2.0 is an open authorization protocol, which allows accessing the resources of the resource owner by enabling the client applications on HTTP services such as Facebook, GitHub, etc. It allows sharing of resources stored on one site to another site without using their credentials. It uses username and password tokens instead.

he authorization process verifies whether you have permission to access the data you want from the server. When you send a request, you often have to include parameters to ensure the request has permission to access and return the data you want.

Thanks