Operations | Monitoring | ITSM | DevOps | Cloud

For modern engineering and DevOps teams, user experience isn’t a post-deployment concern, it’s a critical operational metric. Monitoring how real users interact with your application is no longer optional, especially in high-traffic, dynamic, or global environments. This is where real user monitoring (RUM) proves indispensable. But RUM isn’t the only approach.

As applications grow more complex and user expectations rise, delivering seamless and high-performing experiences to users is non-negotiable. Real User Monitoring (RUM) has emerged as an essential technique that provides developers, DevOps teams, and site reliability engineers with deep visibility into the actual performance of web applications that capture the experiences of real people in real-time.

Great Lighthouse scores, but your site is still slow. Sound familiar? You’ve run PageSpeed Insights, Request Metrics, and every other synthetic test you can find. Your scores look great. But your analytics shows users bouncing, conversions dropping, and complaints about “slow pages.” What’s going on? The answer is simple: synthetic testing only tells you how your site performs in a test, not how it performs for real users in the real world.

Real User Monitoring (RUM) helps teams understand exactly how their users experience their web and mobile applications—from load times to crashes and frustration signals. But traditional RUM models come with tough trade-offs: capture all sessions and overspend, or sample data and miss what matters. Fixed sampling rates may help manage volume, but they leave dangerous blind spots.

Before we started using Datadog Real User Monitoring (RUM), we relied on frontend logging to gather data about the user experience. Logs gave us some helpful information about exceptions and errors but didn't provide any insight into issues directly related to the user’s perspective.

Mobile developers are increasingly adopting Kotlin Multiplatform to share business logic across iOS and Android. While Kotlin Multiplatform reduces duplication of code-writing efforts, it also introduces blind spots. Developers often lack real-time visibility into how shared code performs across platforms, making it harder to troubleshoot issues and monitor user experience.

Real estate professionals have said for years that the three most important factors about a property are location, location, and location. Well, for organizations with a web presence — which these days is the vast majority, and 100% of e-commerce companies — the three most important factors about their site are visitor experience, visitor experience, and (let’s all say it together!) visitor experience.

Ensuring your application is up and running is never enough. It’s essential to ensure that your application is fast and also error-free to deliver a buttery smooth digital experience for your users. An application performance monitoring (APM) tool will help you track the performance of your application with metrics, reports, and automated alerts, but it doesn’t always capture how real users experience your application.

Delivering seamless user experiences requires deep visibility into web performance. Core Web Vitals—Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS)—serve as critical benchmarks for assessing site health. However, many teams struggle to turn these metrics into actionable insights that can help resolve performance problems.

As a software-based company, the most critical thing you can do is maintain control over your users' digital experiences and satisfaction levels. However, without a monitoring plan and technologies that allow you to see how customers interact with your application or website from their perspective is impossible. They provide you with the information you need to determine how well your webapp or website is operating and to avoid slow pages or screens that drive customers to your competitors.