Return on investment is a very popular financial metric because is a simple formula that can be used to access the profitability of an investment. When dealing with an online ad strategy like PPC platforms like Google Ads also have years of extensive data to back up their reported 800% ROI benchmark. Some marketing strategic investment ROI examples i.e. content writing, Email marketing, social media promotion, etc. To use the marketing ROI investment formula you‘ll identify several leads, average price sale, cost pr ad spend, etc.