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# The Drum series probes why marketing ROI proof keeps getting harder
- URL: https://www.medianexis.com/the-drum-series-probes-why-marketing-roi-proof-keeps-getting-harder/
- Published: 2026-10-27T14:30:44.000Z
- Updated: 2026-10-27T14:30:44.000Z
- Description: The Drum reports that the second episode of its documentary series “The Great Marketing Makeover” features leaders from Salesforce, Mars and Estée Lauder discussing the collapse of the traditional marketing funnel.
- Author: The Signals Desk
- Tags: Measurement, AI, Editorial The Drum, The Drum series probes why marketing ROI proof keeps getting harder

*Signal from* [*thedrum.com*](https://thedrum.com/?ref=medianexis.com) *·* [*Editorial The Drum*](https://www.medianexis.com/tag/by-editorial-the-drum/) *·* [*read the original*](https://www.thedrum.com/news/the-great-marketing-makeover-why-proving-marketing-s-value-is-harder-than-ever?ref=medianexis.com)*.*