Those advertising screens aren't necessarily compliant with the GDPR. https://techgdpr.com/blog/wifi-tracking-retail-analytics-gdpr/ https://techgdpr.com/blog/

Those advertising screens aren't necessarily compliant with the GDPR. https://techgdpr.com/blog/wifi-tracking-retail-analytics-gdpr/ https://techgdpr.com/blog/wifi-tracking-retail-analytics-gdp... has some background. https://www.spring-board.info/differences-between-geo-wifi-footfall-track-explained/ https://www.spring-board.info/differences-between-geo-wifi-f... is from a British company which claims to do compliant tracking in shopping centres etc.