If an advertiser's goal is for campaign efficiency, which ASINs should they avoid using? (Select 2)

For campaign efficiency, avoid ASINs with low sales and low star ratings. ASINs with low sales history often indicate limited customer interest or poor product-market fit, making them inefficient to advertise as they are unlikely to convert well. Similarly, ASINs with low star reviews (e.g., 2 stars) suggest customer dissatisfaction or product issues. Advertising these products will likely lead to low conversion rates and wasted ad spend, as customers are less inclined to purchase poorly reviewed items. Conversely, ASINs with 5-star reviews and best-selling ASINs are generally strong performers and are good candidates for advertising to maximize efficiency.