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In addition to being used as a usual display, the LED large display is used to broadcast the manufacturer's advertisement. In metro stations with very large traffic, it is a must for advertisers. In order to allow more people to see the ads and get the best results, the UK will install a 500-meter LED display at Heathrow's subway station.
The installation of this huge LED display in the Heathrow metro station in the UK will definitely attract people's attention. Compared with traditional billboards, LED billboards can display more vivid and vivid images, which can create more commercial value. Maybe after a while, in the subway stations in Beijing, Shanghai and Guangzhou, we might also see such a display. 
Amazing! London subway will build 500 meters long LED display
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