In the current web development environment, balancing user behavior tracking with privacy compliance is essential, and this guide offers a detailed tutorial for web developers using JavaScript and the Next.js framework. Drawing from the integration of consent and tracking on the Prismic website, the tutorial covers the use of Segment, an analytics platform, and Usercentrics, a consent management tool, to ensure data collection adheres to legal standards. It walks developers through setting up a basic Next.js application, incorporating Segment for user behavior tracking, and implementing Usercentrics to manage user consent, resulting in a data-rich and privacy-compliant application. The guide further explains how to integrate Prismic to facilitate data transfer to Segment, enabling detailed website analysis. Additionally, it highlights the importance of user consent, particularly under regulations like GDPR, and demonstrates how to load Segment based on user consent via Usercentrics' event system. The tutorial ensures that developers can effectively track and analyze user interactions while respecting privacy laws, with suggestions for expanding services and enhancing tracking capabilities, ultimately providing a robust and privacy-conscious analytics solution for Next.js applications.