callout big picture

develop-docs/application-architecture/dynamic-sampling/the-big-picture.mdx

@@ -9,7 +9,8 @@ sidebar_order: 1
 
 <Alert title="💡 Note" level="info">
 
-Dynamic Sampling currently operates on either spans or transactions, based on the feature flag `dynamic-sampling-spans`. The logic between the two event types is similar, so most of this documentation is kept at a generic level and important differences are pointed out explicitly. 
+Dynamic Sampling currently operates on either spans or transactions to measure data throughput. This is controlled by the feature flag `organizations:dynamic-sampling-spans` and usually set to what the organization's subscription is metered by. In development, this currently defaults to transactions.
+The logic between the two data categories is identical, so most of this documentation is kept at a generic level and important differences are pointed out explicitly.
 
 </Alert>