Question

what is captcha?? why it is really used??​

Answer 1

Answer:

CAPTCHA or Completely Automated Public Turing test to Tell Computers and Humans Apart is a technique to distinguish between humans and computers. CAPTCHA is mainly used as a security check to ensure only human users can pass through. Generally, computers or bots are not capable of solving a captcha.

Explanation:

Answer 2

Captcha Or completely automated public turning test to tell computers and human apart is a technically to distinguish between humans and computers . captcha is mainly used as a security check to ensure only human user can pass through.