ReCAPTCHA, acquired by Google in 2009, is a widely used fraud detection technology designed to prevent unauthorized bot access to websites by requiring tests that are easy for humans but challenging for bots. Initially aimed at digitizing old books, reCAPTCHA has evolved to focus on accessibility and security, now protecting over five million sites. Recent advancements have led to its application in payment verification, demonstrating its adaptability and importance in combating the rising trend of bot traffic, which accounted for nearly half of internet activity in 2023. Various versions, like legacy, checkbox, invisible, and NoCAPTCHA reCAPTCHA, offer different levels of user interaction and security, with NoCAPTCHA reCAPTCHA v3 offering minimal user friction through background risk analysis. While reCAPTCHA effectively limits malicious bot traffic and enhances fraud prevention, concerns remain regarding its accessibility for disabled users and its occasional speed issues. Despite these challenges, the benefits of using reCAPTCHA, such as improved security and trust, make it an appealing option for websites expecting significant user interaction or traffic spikes.