In Postman, a collection is a group of related HTTP requests that can be saved and organized together. It's a useful feature that allows you to group requests that belong to the same API or project in a single place, making it easier to manage and share them.
A collection can contain multiple requests, each with its own unique endpoint, method, headers, and body parameters. You can also add scripts to a collection or individual requests to automate tasks or perform tests.
Check out the below video tutorial to know more about Postman technology -