To prevent spam and ensure the authenticity of user interactions, many websites use a human verification process. This involves pressing a button or completing a simple task to confirm that the user is a human.
The verification process typically asks users to answer a question or complete a task that requires human intelligence, such as recognizing and recalling visual information. By verifying that users are indeed humans, these sites can prevent automated bots from accessing their content.
This type of security measure is commonly used in comment sections, contact forms, and other areas where user input is required. It helps to maintain the integrity of online interactions and prevent malicious activities, such as spamming or phishing attempts.
Source: https://www.sfchronicle.com/entertainment/article/matthew-lawrence-robin-williams-lessons-20281470.php