Weak labels sound like internal folders: Sales, Support, Product. Strong labels describe what is happening in the visitor conversation: high-intent buyer, confused evaluator, competitor comparison, migration blocker, unexpected use case.
A good label should make the next action obvious. If the action is "a rep may want to join now," notification makes sense. If the action is "review later," keep the label log-only.
Custom conversation signals and their first-match notifications require Pro or Business. Pro supports up to three active signals per Stand-in; Business supports up to ten.