# Impact Testing You can impact test in two main ways: **Against existing customer profiles.** You can upload a CSV of all your customer profiles (tens of thousands if you like) and run these against your pricing project changes. **Against imagined customer profiles.** You can upload a CSV of different customer profiles and cohorts (tens of thousands if you like) and run these against your pricing project changes for this idealised audience. In either case, this will create a distribution of prices that you can see the average result and the validity (i.e. percentage of quotes that are not excluded). You can download these results as a CSV for offline analysis. You can also pick any test and run it within the build tab to see the breakdown of each step of the pricing process. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://swallow-1.gitbook.io/swallow/test/impact-testing.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.