利用目标客户洞察，您可以通过以下哪两种方式来优化推广活动？请选择两项

Leveraging audience insights allows you to refine your targeting and tailor your messaging for greater campaign effectiveness. "细化目标客户" (Refine target audience) is correct because insights help you understand specific demographics, interests, and behaviors, enabling you to narrow down or expand your audience to reach those most likely to convert. "定制广告内容" (Customize ad content) is also correct as insights reveal what resonates with different segments, allowing you to create more relevant and engaging ad copy, visuals, and calls to action. "了解何时结束推广活动" (Understand when to end the campaign) is incorrect; while insights inform campaign duration, they don't directly dictate the end date in an optimization context. "提高出价" (Increase bids) is incorrect; while bidding is part of optimization, insights primarily inform who to bid for and what to show them, not simply to increase the bid amount without other adjustments.