To verify that you are indeed a human, the system requires you to press and hold a key on your keyboard for a few seconds. This process helps detect and prevent automated software (bots) from pretending to be human users. The reference ID provided earlier is linked to this security measure. By confirming you are a human, you help protect our platform’s integrity and ensure that all interactions are legitimate and trustworthy.
Source: https://www.sfchronicle.com/bayarea/article/gavin-newsom-menendez-brothers-20777847.php