A5: Compelling ad copy is crucial in Google Ads retargeting as it aims to grab the attention of users who are already familiar with a brand. By using persuasive language, highlighting unique selling points, emphasizing limited-time offers or discounts, and including a strong call-to-action, businesses can entice users to click on the ads and revisit their website, ultimately leading to conversions. Crafting compelling ad copy and testing different messaging approaches allows businesses to optimize the effectiveness of their retargeting ads and improve their chances of success.