Postman Collections are a group of saved requests you can organize into folders.
Every request you send in Postman appears under the History tab of the sidebar. On a small scale, reusing requests through the history section is convenient. However, as your Postman usage scales, it can be time consuming to find a particular request in your history. Instead of combing through your history section, you can save all your requests as a group for easier access.
Let’s review how to send a basic request and create a new collection.
Enter a request in the request builder and click the Save button to open the SAVE REQUEST modal.
Save this request to an existing collection, or create a new collection by entering a collection name, and then click the Save button.
Congratulations! You can see all of your collections under the Collections tab of the sidebar on the left.