The highest-ROI channel is not the one that makes the most profit

    £6.36

    Print full ROI

    3.3%

    share of spend

    4.8%

    share of profit

    Print had the highest full profit ROI of any channel (£6.36 per £1) but only 3.3% of spend and 4.8% of full profit. The highest-ROI channel is rarely the biggest profit driver, because ROI falls as spend scales.