Tesco Homeplus Virtual Subway Store in South Korea：When grocery chain Tesco wanted to expand their market share in South Korea, they came up with a brilliant idea.

Because the people in South Korea work long hours they thought of an efficient way to sell their products. The Korean subsidiary Home Plus put up billboards in subway stations with their range of products, accompanied by QR, or Quick Response codes. All people had to do now is scan the QR codes with their cell phone and the groceries were delivered to their doorsteps.