This read-only Gauge32 counts the number of bytes dropped that matched this rule, measured over the past active minute. An admin watches this to see whether a specific application's traffic is currently experiencing loss, which is more actionable than an aggregate drop counter when trying to explain a particular app's complaints. For example, nonzero bytes dropped on a rule tied to a VoIP application in the same minute users report choppy calls strongly implicates that rule's traffic path.