Simple genius. Divide the world into 3x3 metre squares assign a combination of three words to each square, hey presto, you've mapped the world. More memorable than Lat and Long for the billions in the world who have no formal address.

No end of love for W3W. I'm amazed it hasn't taken over the world by now, it's genius. I use it regularly.

I love What3Words, works great when you are meeting with people at places that doesn't have an exact address