i came across it while reading a world travel website that i regularly follow. basically, in your travels when you encounter someone or something that is worth remembering, making note of, or showing appreciation for you can pin it on your map and leave a little [or big] comment about your encounter. it's an incredible idea! AND if someone has an encounter with you and finds it noteworthy, there is a possibility of you coming across it in a search on the site. i wish i would have known about this during my travels to washington state and up through canada. i made quite a few connections with strangers that i won't forget. i will def be using it when i set out again. thanks world travel website for the find!