# Reference


> Definitions for CDNPulse metrics, browser timing fields, transfer size, geography, and data quality requirements.




This section defines the analytics fields shown in CDNPulse. Use it when you need to read browser Resource Timing data, compare providers fairly, or explain why timing headers affect measurement quality.




## Pages
- [Metrics Reference](/docs/reference/metrics-reference/index.md): Reference for the browser timing and analytics metrics shown in CDNPulse.