Two tools, one truth: Mastering Synthetic and Real User Monitoring

Synthetic monitoring tells you about your pages. Real user monitoring (RUM) tells you about your users. Together, they give you the complete picture of web performance — and without both, you're always flying partially blind.

In this session, front-end observability veterans Tammy Everts and Cliff Crocker cut through the confusion around synthetic and RUM — what each measures, what each misses, and why the most effective teams use both.

Whether you've been running synthetic tests for years and are wondering what you're leaving on the table, or you're drowning in RUM data and aren't sure how to act on it, this session is for you.

This isn't a product walkthrough. It's a practical, experience-driven conversation about how great observability teams operate. Expect real use cases, honest tradeoffs, and decades’ worth of hard-won insights.