Focus on the GfK Media Efficiency Panel. It displays a worldwide unique measurement of online behaviour and media usage combined with shopping behaviour (online and offline) in a single source panel with a sample size of 23,000 individuals.
We鈥檝e updated our privacy policy so that we are compliant with changing global privacy regulations and to provide you with insight into the limited ways in which we use your data.
You can read the details below. By accepting, you agree to the updated privacy policy.
