Run one collection dozens of times with different inputs — without duplicating requests. In this module you'll parameterize a Movies API request with {{movieId}} and {{expectedTitle}}, drive iterations from a CSV or JSON data file in the Collection Runner, then attach the same file to a Monitor and prove the cloud run executed every row. Data files are a Solo+ feature; you'll need a paid Postman plan to complete the monitor steps. You'll practice against the Movies API, a free public REST API with no authentication. When your testing outgrows fixed files, the follow-up module covers datasets — reusable, unlimited test data that also works in CI.