Whether you should run manual product targeting ads for new products on Amazon depends mainly on your marketing goals and budget.

Manual product targeting ads (also known as manual ads or CPC ads) are a form of paid advertising that allows you to precisely target products on Amazon through search keywords. The main advantages of this form of advertising are precise control of ad placement, keyword optimization and exploration, and flexible adjustment of advertising strategies. With manual ads, you can better understand users' search behavior and potential keywords, and further improve the targeting and effectiveness of ads by monitoring ad performance and optimizing keyword selection.

For new products, manual product targeting ads can help you quickly gain exposure and clicks, and increase product awareness and sales. Especially when the product is in a small category and the keyword ranking is already high enough, but the traffic is bottlenecked, using manual product targeting ads can help you break through traffic restrictions and get more exposure and conversions.

However, it should be noted that manual ads require more management and optimization work. You need to pay close attention to the performance of the ads and make adjustments based on the data, such as increasing or decreasing bids, changing keywords, etc. In addition, advertising expenses need to account for a certain percentage of sales, so you need to consider factors such as budget and profit margin.

To sum up, if your marketing budget is sufficient and you want to quickly increase the popularity and sales of new products, then turning on manual product targeting ads is a good choice. But if you are not familiar with ad management and optimization, or have a limited budget, then you may need to carefully consider whether to use this form of advertising.