On this page:
Ajax request browser-based snapshots give you a detailed look at an individual Ajax request. The Summary tab covers general characteristics of the page.
The top of the Ajax snapshot displays a waterfall graph of the overall transaction timing for the Ajax request. The snapshot is labeled either a Real User Snapshot or a Synthetic Snapshot based on the origin of the request. You can hover over each of the metrics to see a popup definition for that metric.
For a detailed description of what these metrics mean, see Browser RUM Metrics.
Much of the information is the same as you see for page-based browser snapshots. The main differences are: