What is RUM?
RUM stands for Real User Monitoring. The performance of a website can vary based on the user’s device or the network connection. Field data (Real User Monitoring) is performance data from real users on your website. The device and network conditions are not the only reason why RUM is necessary for a reliable web performance concept. The display of personalized content can take a different amount of time. Lad-based testing isn’t able to measure that.
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