It is extremely convenient when filling in online forms, giving an address over the phone, or when getting into a non-app taxi. Web forms and the in-car naviga

It is extremely convenient when filling in online forms, giving an address over the phone, or when getting into a non-app taxi. Web forms and the in-car navigation prompt first for the postcode, then present a list of the full addresses and you pick one. Over the phone, "W10 6TR" also avoids needing to spell anything, and I encourage you to search Google for it. There's also some human readable part. The W means West London, people who live in West or South West London will be familiar with some numbers - W10 is Ladbrook Grove. B is Birmingham, BS is Bristol, BT is Belfast etc.