How to Use Postman Properly: Collections, Environments, Secrets, and Auth

Postman is widely used for API testing, but many developers rely on basic habits like hardcoding tokens and pasting URLs without leveraging its full capabilities. Collections allow users to group and save all requests for a given API, making them reusable and shareable across teams. Environment variables enable dynamic switching between dev, staging, and production endpoints without manually editing individual requests. Sensitive values like API keys should be stored as secret-type variables, which are masked in the UI and excluded from plain-text exports to reduce exposure risk. Postman's Authorization tab also automates common authentication headers, eliminating the need to manually configure them for each request.