CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is an authentication system commonly used on websites to differentiate human users from automated bots. Its primary purpose is to secure online platforms against malicious activities such as spam, hacking, and data theft. CAPTCHA presents users with challenges that are easy for humans to complete but difficult for bots. These challenges can include image recognition, distorted texts, or logical puzzles. By successfully solving the CAPTCHA, users prove their authenticity, granting access to restricted content or features. Despite being an occasional inconvenience, CAPTCHA plays a crucial role in preserving online security and ensuring a seamless user experience.#32#