"The retail apocalypse refers to the closing of a large number of American retail stores beginning in 2016...as American consumers shift their purchasing habits due to various factors, including the rise of e-commerce... Of 1,200 shopping malls across the US, 50% are expected to close by 2023* (Wikipedia)
QR codes - you can scan a QR code from a receipt, a business display at the storefront, a product, or even posted on the web, in order to connect with the company