Blockchain could be the most important innovation since the Internet. We are reeling from the Equifax leak. There is a huge trust problem on the Internet. Blockchain solves these problems, however it will take time for each industry vertical to gain the full benefit.
These two videos provide a great crash course in understanding Blockchain and some real world use cases.
Ticketmaster Presence – could be based on blockchain.
More in-depth definition and use cases. https://en.wikipedia.org/wiki/Blockchain