What type of data does RUM primarily visualize?

RUM, or Real User Monitoring, primarily focuses on visualizing user session interactions with resources. This includes tracking how users engage with a website or application, the pages they visit, how long they spend on each page, and any client-side errors they experience. The visualizations provided by RUM help in understanding the actual user experience as it occurs in real-time.

By capturing detailed information about user interactions and performance metrics specific to front-end activities, RUM enables teams to gain insights into user behavior and performance bottlenecks. This is crucial for optimizing the overall user experience and ensuring that the website or application functions smoothly under real-world conditions.

In contrast, other options like user demographics data, error rates from backend services, and API response times represent different aspects of application monitoring that are important but fall outside the primary focus of RUM. RUM looks specifically at how users interact with the application, making it an essential tool for understanding and improving the front-end experience.