Blockchain technology is claimed to be according to blockchain proponents to be one of the most impactfull discoveries in the recent history. It is promised to have a massive potential to change how we handle online transactions. Despite some skeptics, the majority of experts agree that blockchain has the potential to disrupt the banking and financial industry, and many other ones! To put it simply, blockchain enables decentralized transactions across a P2P network. There are applications where those propertied can be very useful, but there are many cases where blockchain migh not be the best solution even though it is hyped to be solution for very many application (remember to ask Do you need a blockchain? often).
Infographic by bitfortune.net