Ad profitability depends heavily on the sector

    full profit ROI per £1

    Retail (Large)£6.93
    Automotive£4.65
    FMCG£1.48

    Advertising's full profit ROI varies widely by sector: £6.93 per £1 in large retail, £4.65 in automotive, £3.13 in telecoms, £1.95 in financial services and £1.48 in FMCG, reflecting product value, margins and how strongly ads move sales.