Klarna is a big player in the buy-now-pay-later space.After many years of speculation, the Swedish buy now, pay later (BNPL) company Klarna Group (KLAR -0.13%) recently hit the public markets. It priced shares at $40 and raised roughly$1.37 billion in capital, giving it a valuation of roughly $15 billion.Klarna is the latest in a string of recent initial public offerings (IPOs) that have been met with enthusiasm after years of basically a frozen market. Here's everything you need to know about this recent ...