How does buy now, pay later work?

via https://ift.tt/s6vhxwr Get in losers, we're going shopping.

I don't suffer from chrometophobia — the fear of spending money — nor do I have a compulsive buying disorder, which actually affects about 18 million adults in the U.S. But despite a desire to be an earth tone/thrift store/reusable soap … How does buy now, pay later work?