how to use collection in postman code example

Example 1: what is collection in postman

Postman is a Client toolto work with APIs to
send requests get responseOrganize the requestsCollection 
in Postman is a top level folder
to store your requests so we can run any time

Example 2: collection postman

Postman is a Client toolto work with APIs to send
requests get responseOrganize the requestsCollection
in Postman is a top level folder
to store your requests so we can run any time