reCAPTCHA: Easy for Humans and Hard for bots
Captchas are used on many websites to protect user accounts from bots and other automated programs, preventing them from accessing the website. According to Imperva's research, harmful bots generate 25.6% of all web traffic in 2020. They are used by spammers to send automated messages to users, and by hackers to attack websites with automated scripts that often wreak havoc on the site’s performance.