In React, effectively managing activity between pages involves organizing components into page and block categories, reducing the need to pass numerous props by leveraging the address bar to maintain state. Utilizing react-router-dom for web applications allows for dynamic URL management, enabling developers to set up multiple page routes efficiently while maintaining state through the browser's history object. By structuring applications in this way, developers can create separate, focused mini-apps for each page that share reusable block components, minimizing state and prop complexity. This approach enhances performance and reduces processing demands by allowing dynamic parameter handling in URLs, eliminating the need for components to be aware of the entire data structure. Additionally, tools like LogRocket can be integrated to monitor and improve digital experiences through modern React error tracking, further optimizing application performance and maintenance.