A learning layer improves with use. The more your team reviews and approves, the better each rule's defaults fit your accounts. It stays in rules-only mode until there's enough history to trust (a cold-start safety gate), and brand terms are kept out of it so they don't distort it.
Smart rescue lets the learning model keep a converting term even when plain relevance would skip it — important for local searches, synonyms, and product nicknames that still produce sales.
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