Return On Ad Spend [ROAS] is a marketing metric, showing how much money one is making from the ad campaigns one is running. Is an ad campaign even paying for itself? Is it making money? Is it losing money? Whatever your answer, that's the "ROAS" of that particular ad or campaign. ROAS is calculated this way: divide the income derived from an ad or campaign (for a period) by the ad spend for that same ad or campaign for that same period.
