Rules
A rule picks spans by what they look like and acts on them: drop, sample, rename, redact, reshape. How rules run
SpanSlice documentation
Rules that run inside your services and decide which spans reach your observability backend, and in what shape.
Sampling
Keep 1 in N traces, or 1 in N of a noisy span inside a kept trace. Trace and span sampling
Actions
Every action in the rule editor: what it does and where it can be used. Actions reference