_:n0e9e91af7f9040f9a18495b28ca5ba60xb0
<http://schema.org/description>
"What is a CAPTCHA? CAPTCHA refers to a completely automated public Turing test that is useful to differentiate between computers and humans. CAPTCHA is mainly used to determine whether the website user is real or a spam robot.&nbsp; CAPTCHA is essentially an anti-spam tool that asks users to prove"
<https://onpassive.com/blog/why-websites-need-to-use-captcha/>