In Agile methodology, automation tests are conducted before each sprint to ensure that the developed features meet the acceptance criteria and are free from defects. Automated tests help in achieving continuous integration and delivery by providing rapid feedback on the application's functionality. This frequent execution of automated tests aligns with Agile principles, allowing teams to catch issues early in the development process and deliver high-quality software iteratively.

Postman's use of Environment Variables as an advanced feature allows for dynamic data use in API testing. Environment Variables in Postman enable testers to manage and reuse data across multiple requests, enhancing flexibility and efficiency in API testing scenarios where dynamic data is crucial for thorough testing.