Louisa 正在设计要投放在领英上的广告。她应该考虑哪些主要组成部分？请选择所有合适选项。

When designing LinkedIn ads, Louisa should consider several key components to ensure effectiveness. 文案 (Copy) is crucial for conveying the message, value proposition, and call to action. Strong, clear copy engages the audience and drives conversions. 形式 (Format) refers to the ad type, such as single image, video, carousel, or document ad. The chosen format impacts how the message is delivered and perceived. 配图 (Visuals), including images or videos, are essential for capturing attention and reinforcing the message. High-quality, relevant visuals significantly improve ad performance. Finally, 测试 (Testing) is vital. A/B testing different versions of copy, visuals, and formats allows Louisa to optimize ad performance and identify what resonates best with her target audience. All these components work together to create a successful LinkedIn ad campaign.