So now we can bid more aggressively on searchers who have a low ACoS (like those in the Close Match bucket), and bid down, therefore saving budget, on searchers in the loose match segment, which are much more likely to have a higher ACoS. Within the ad targeting section of the Amazon Ads interface, you can view the ACoS for each group, and apply a bid adjustment. Alternatively, if a targeting method has a ACoS above the acceptable level, hit the ‘Active’ toggle and switch it off altogether. Win Win.