What is captcha code?

A CAPTCHA code is a type of challenge-response test used in computing to determine whether or not the user is human. It is typically a distorted image of letters and numbers that the user must enter correctly in order to proceed with a task, such as submitting a form or accessing a website. CAPTCHA codes are used to prevent automated bots from performing certain actions, such as spamming websites or creating fake accounts.

CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a mechanism to ensure that only humans interact with a specific web application, service, or platform. It is a verification tool that helps to combat automated access to websites and unauthorized activities such as spam, bot attacks, and brute force attempts.

CAPTCHA typically involves a series of characters or images that are displayed on a screen and the user is asked to identify or interpret them. The characters or images are often distorted or obscured to make them more difficult to be interpreted by automated systems but more easily readable for humans.