Li manages ad strategy at a pet supply company. He is interested in understanding the nature of his audience, such as the income or age range, on Amazon.com. Which insights would be most useful for him to review and craft the advertising strategy?

The correct answer is Demographic insights because these insights provide detailed information about the characteristics of Li's audience, including factors such as income, age range, and other relevant demographic data. By analyzing demographic insights, Li can better understand who his potential customers are, which will help him tailor his advertising strategy to effectively reach and engage these specific groups. In contrast, timing insights focus on when customers are most likely to shop, and purchase frequency insights examine how often customers buy products, but neither offers the comprehensive audience profile that demographic insights provide, making them the most useful for crafting an effective advertising strategy.