What are environmental variables in Postman?

The environment is a set of variables in the form of key-value pairs (key: value) that we can use in our Postman requests. Environments are meant to be reused in different API requests, these variables store environment-specific information like base-URL for the API requests, and API-Keys and are automatically included wherever these variables are referenced. For example, the base URL of the API requests can be different can for different for the development and production, so we can create a separate environment for the development and a separate environment for the production.

Postman is a popular API testing tool that is used to simplify the process of developing and testing APIs (Application Programming Interface). API acts as a bridge between two software applications which enables them to communicate and share data. Postman provides a simple Graphical User Interface for sending HTTP requests Like GET, POST, Put, Delete, and view their responses.