AI is a field in computer science and its primary goal is to develop intelligent machines that can have general intelligence equal to or better than a human being.
The final version of AlphaGo, an older version of which beat the world Go champion Lee Sedol, came out a few days ago and it's quite shockingly innovative.
It learned by itself without any human input. Playing against itself, it always had the perfect opponent (the perfect sparring partner; that is, someone who is identical to you) so it could learn fast.
As the researchers said, algorithms are much more important than accumulating data. I think this is something to note, because the human brain takes not that much data and it learns so much from it. I think AlphaGo Zero's success shows how the human brain's superior algorithm, not really the amount of data it has, enables it to perform so many different tasks and learn so quickly (often just by looking at an object once).