This planet of ours is mapped into 3 x 3 square metre blocks, thats 57 trillion 3 x 3 square metre blocks and each of these blocks is given a unique 3 word coding. Thats just 3 single words per block that reaches 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 the rescuers 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 getting found when 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 getting found when lost in a sea of tents. This app is also useful to work alongside other apps such as maps too.