ROAS - Return on Ad Spend - Return on ad spend is the most common way for eCommerce sites to measure how effective your advertisement is. ROAS is the multiple which your advertisement spend is generating. The calculation is revenue generated from ads divided by the ad spend. - Example: - TheBestFishingSupplies.com spent 100$ on ads. Those ads generated 3500$ of revenue. - 350 / 100 = 3,5 - The ROAS of the campaign is 3,5 (or 350%) - Sometimes ROAS is shown as a percentage, for example Google Analytics shows ROAS in percentage, but it’s common to talk about ROAS in full numbers.