What is Blockchain? A simple explanation

What is Blockchain? Blockchain seems complicated, and it definitely can be, but its core concept is really quite simple. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Subscribe to Facts. http://goo.gl/yEIawC - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #Facts #Blockchain #Crypto