To confirm you are a human, Google uses a process called CAPTCHA. This involves pressing a button on the screen to validate your response and distinguish it from automated programs. The reference ID provided is used to track the verification request, ensuring only legitimate users can complete the task.
Source: https://www.sfchronicle.com/sports/annkillion/article/audacity-steph-curry-puts-warriors-back-nba-20254962.php