NFC (Near Field Communication) chips allow your phone to scan an internet address just by tapping the phone to a sign. It is similar to the technology used for contactless card payments and the Oyster Card.
Not all smartphones have this technology. Check your phone settings to see if there is an ‘Enable NFC’ option, and turn it on.
When you see an NFC symbol, turn on the phone and touch it to the symbol to go straight to the internet page (you need to have an internet connection as well).