Nielsen states that its 2025 Annual Marketing Report comes to the conclusion that marketers are driving investment in digital channels because they are perceived to have measurability and direct attribution. Nielsen says ease of measurement does not always equate to effectiveness or higher ROI. “Proprietary
KPIs and lower CPMs can be misleading, and a channel’s ability to claim conversion credit doesn’t necessarily translate to real value. This bias can lead to underinvestment in traditional channels, like radio, which, despite being perceived as less effective, can deliver substantial ROI.” The perceived effectiveness of radio by marketers puts it dead last in ROI. But a weighted average shows that radio is second only to social media in ROI. The study also found that “podcasts demonstrate strong ROI, comparable to TV and digital display, yet they are often overlooked or undervalued.” See more about the study here.
