使用智慧出價和廣泛比對後，應採行哪三項廣告活動最佳做法？

When using Smart Bidding with Broad Match, monitoring Quality Score is crucial because it directly impacts ad rank and cost-per-click, even with automated bidding. Responsive Search Ads (RSAs) are essential as they allow Google to automatically test various ad combinations, optimizing for the best performance with broad match queries. Paying attention to negative keywords is vital to prevent your ads from showing for irrelevant searches, which can waste budget and dilute the effectiveness of broad match by ensuring your ads only appear for valuable queries. Cross-device reporting is a general reporting feature, not a specific best practice for this combination. Using contextual signals is more relevant for display campaigns.