Try thinking of it this way. I'm a bank. I loan you ten thousand dollars for home improvements. You then either do the work yourself, or you hire someone to do it for you. If you hire someone, you are creating a job, or at least creating work, in economic terms. But even if you don't hire anyone and you do the work yourself, you are creating jobs or work if you buy any materials or tools to help you do the work. Because someone has to prepare those materials for you (wood doesn't come as 2x4s, for instance, but trees have to be turned into 2x4s). The upshot is, by loaning you ten grand for home improvements, I have enabled you to create work or jobs for people.
Credit is one of the biggest factors in the US economy -- and in virtually all industrial economies. Not too long ago, the Federal Reserve tightened the credit market just slightly. This slight tightening was done to slow the rate of inflation. It was also calculated that it would cost at least 400,000 US jobs. Basically, when the Fed raises interest rates, it reduces the amount of credit (lending) that goes on, and that costs jobs, even though it fights inflation.