What are Subscribe&Save metrics best used for?

Subscribe & Save (S&S) metrics are best used for signifying longer-term brand loyalty and driving incremental sales, even after a campaign ends. When a customer subscribes, they commit to repeat purchases, indicating a strong preference for the brand and its products. This recurring revenue stream contributes to sustained sales growth beyond the immediate impact of a campaign. Assessing awareness of a brand's products is typically measured through metrics like impressions, reach, and brand searches, not S&S. Assessing the number of impressions served to shoppers is a measure of ad visibility, not customer loyalty or recurring purchases.