The more you know about something, the better you can appreciate it, right? And, it seems, we've all got a lot of love for whiskey these days—business is booming like never before. In 2016, 556 million liters of whiskey were sold in the US. Now that's a lot of booze, but that number grew in just one year by almost 20 million liters to over 576 million. That's basically 9.78 billion 2 oz pours of whiskey sold in 2017, in the US alone. But the world of whiskey is a vast and often bewildering place for anyone who hasn't spent years thoughtfully sipping the fine brown spirit or traveling to distilleries the world over. It would take years to develop a connoisseur's knowledge. But this handy primer is a cheat sheet of sorts to know what to look for (and what it means).