This test copy will allow users to test a new product or feature before it is released to the public. The test copy will provide users with an opportunity to provide feedback and help shape the final product. The test copy will also help identify any potential issues or bugs that need to be addressed before
From Wikipedia
Copy testing is a specialized field of marketing research, that determines an advertisement's effectiveness based on consumer responses, feedback, and behavior. Also referred to as pre-testing, it might address all media channels including television, print, radio, outdoor signage, internet, and social media.