The chart displays the US Retail Campaign ROI Index (2018–2025) by channel, highlighting the superior return on investment generated by digital platforms. Online advertising leads all channels with the highest ROI index of 1.4. Social Media is the second-most effective channel, with an index of 1.25. Email Marketing follows closely behind at an index of 1.15. Traditional media channels have significantly lower ROI indices, with Television at 0.93 and Print Advertising having the lowest index at 0.82. The data demonstrates a clear hierarchy in campaign effectiveness, where the top three digital-focused channels (Online, Social Media, and Email Marketing) all score above 1.0, indicating positive returns, while the traditional channels (Television and Print Advertising) score below 1.0. The difference between the highest and lowest ROI index is 0.58 ($\mathbf{1.4 - 0.82 = 0.58}$), underscoring the shift toward digital for optimal retail advertising performance.
| Labels | ROI Index (2018–2025) |
| Online | 1.4 |
| Social Media | 1.25 |
| Email Marketing | 1.15 |
| Television | 0.93 |
| Print Advertising | 0.82 |
