What is CAPTCHA?

CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a security feature used to differentiate between human users and automated bots. It typically requires users to complete a task, such as identifying distorted characters, selecting images that match a certain description, or solving a simple puzzle.

Captcha is used to prevent spam, fraud, and abuse by ensuring that actions like form submissions or account registrations are performed by real people. For example, when signing up for a website, a CAPTCHA may appear to confirm that the user is not a bot trying to create fake accounts. This helps improve security and maintain the integrity of online services.