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 labels and their first-match notifications require Pro or Business. Open Stand-ins → the chosen Stand-in → Edit → Skills → Labeling. Enable the skill, add a name and matching prompt, turn on Active, choose whether to notify, and Save. The plan allowance shown beside Labeling limits the number of active labels.