This planet of ours is mapped into 3 x 3 square metre blocks, that’s 57 trillion 3 x 3 square metre blocks and each of these blocks is given a unique 3-word coding. That’s just 3 single words per block that reach all corners of this planet.
So if you have this smartphone app (available in android and iOS) on your phone and you find yourself lost in some national park or you require urgent assistance, then by using this app it will give you 3 unique words (ie, barn.road.fence) and by giving the rescuers these 3 words they will know exactly where you are and can get people to you. This smart app is widely used these days and the emergency services would like us all to have it on our phones in case we need to be found when we may have got lost.
I am told that many people have this app on their phone to log where their tent is when they go to music festivals and so enables their tent to get found when lost in a sea of tents.
This app is also useful to plan a journey if you know your destinations 3 words too.