The innkeeper wants to put your HearthStone knowledge to the test.
It doesn't matter if you're a beginner or a veteran; you are sure to find a good challenge here. Start up a new quiz and the innkeeper will present you with a series of cards, asking for one of its attributes. Learn all cards from that new expansion set, or challenge your friends: what are you waiting for?!
TavernQuiz is still in alpha and under active development by @GGknugen. I have a ton of features in mind (probably more than what's good for my sanity levels), and if you want to be notified about them as they roll out you can follow @TavernQuiz on Twitter. The same goes if you want to send feedback/love/bug reports/whatever :)