Link is ... "a content delivery mechanism for data, a searchable index for meta-data, a record of account for anything (not just currency), but it does so by literally transforming the blockchain into programmable framework that can be freely modified and adapted to whatever the user desires. The directions it can be taken from there are limited by imagination... how would you like to reprogram your blockchain today?" - Travis Savo
tl;dr : It's The Pirate Bay on steroids. It can't be taken down. But it's so much more too. Patents, notary service, exchanges, information ... you name it and it's all decentralized.
Side Note : It's amazing to watch stories about Miley, Rihanna, etc reach 1M views here, while stories revealing the technology that will end tyrannical control over the world receive no attention at all. Your loss.