Hoku lani is an advertiser at a designer pottery brand.She recently rana campaign where her primary goal was to drive purchase for herbrand'sclearance on last season's wooden planters.Which metric would be the best indicator of this campaign's success in helping drive purchase?

Return on Ad Spend (ROAS) is the best indicator because it directly measures the revenue generated for every dollar spent on advertising, making it ideal for evaluating campaigns focused on driving direct purchases and sales, like a clearance event. A high ROAS indicates the campaign effectively converted ad spend into sales. Brand halo is incorrect because it measures the positive impact of a brand's reputation on other products, which is a broader brand-building metric, not a direct purchase driver. Subscribe & Save is incorrect because it relates to recurring purchases and customer loyalty programs, not the immediate sales objective of a clearance campaign.