Netlify has implemented Akismet, a spam detection service, to filter out unwanted submissions from its forms. This change aims to improve the user experience by minimizing latency impact on form submissions and providing better security against phishing attacks, malware, and other malicious content. The new system will notify site owners only when valid messages are received, while keeping the submission process simple for users. CAPTCHA is no longer required after the implementation of Akismet filtering.