CAPTCHA stands for Completely Automated Public Turing test to tell Computers and Humans Apart.
It is a challenge-response system test designed to differentiate humans from automated programs. A CAPTCHA differentiates between human and bot by setting some task that is easy for most humans to perform but is more difficult and time-consuming for current bots to complete (Source: SearchSecurity.com).
In Pulse Commerce, CAPTCHA is used in the Contact Us form and password reset features on the storefront, to prevent spammers from submitting spam. This saves you time and empowers you to focus on legitimate emails from customers instead of junk mail from spammers.