What is the principal reason for using product attribute targeting in Amazon Sponsored Products on Amazon.co.jp?

The principal reason for using product attribute targeting in Amazon Sponsored Products on Amazon.co.jp is to directly target customers who are viewing specific competitor products or products within a related category, allowing sellers to position their products as alternatives or complementary items. This targeting strategy enables sellers to capitalize on the existing interest and purchase intent of customers already browsing similar items. By targeting specific ASINs (Amazon Standard Identification Numbers) of competitor products, sellers can show their ads on those product pages, increasing the likelihood that customers will consider their product as a viable option. For instance, a seller offering a premium Bluetooth speaker can target the product pages of other popular Bluetooth speaker brands, directly competing for the attention of customers who are already interested in purchasing a Bluetooth speaker. This strategy can be particularly effective if the seller's product offers a unique feature or a better value proposition compared to the targeted competitor product. Also, product attribute targeting is useful for cross-selling and upselling opportunities by targeting products that are often purchased together. If a seller sells phone cases, targeting the product pages of popular phone models can drive sales of their phone cases to customers who are already buying the phone.