The full form of RUM is Real User Monitoring. It’s used on Computing ,Internet in Worldwide

Real User Monitoring(RUM) is a passive web monitoring technology that records all user interaction with a website. Monitoring actual user interaction with a website is important to website operators to determine if users are being served quickly, error free and if not which part of a business process is failing. Real user monitoring data is used to determine the actual service-level quality delivered to end-users and to detect errors or slowdowns on web sites. The data may also be used to determine if changes that are promulgated to sites has the desired effect or causes errors.