MER, pacing and the daily spend line
Total sales over total ad spend, and the spend per day above which ads lose money.
MER (marketing efficiency ratio) is all revenue over all ad spend, attributed or not — the store-wide check on platform claims. Pacing shows this month’s spend against its profit so far, and the daily spend above which ads lose money at your current margin. An alert fires when ads take more than the orders keep.
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