Wells Fargo and Discover Card say they now provide free credit scores along with Barclaycard and First Bankcard — financial monitoring website, CreditKarma, touts that you can get your credit scores online in minutes — others now offering free scores include the online credit-educational sites Credit.com, Quizzle and CreditSesame.

Credit scores — they’re like report cards for grown-ups. It’s a three-digit “grade” you get on a scale that ranges from 300 to 850. Your score indicates your creditworthiness to potential lenders, banks, landlords, insurance companies, and even to some employers, for instance. I’m sure you know that the higher your score the better.

FICO isn’t the only number used to determine your credit risk — the score that counts is the one your lender uses. There is no single credit score number — the compilers of the widely accepted FICO Credit Score allow lenders to customize their system, so different lenders produce different scores.

A good FICO score is one that exceeds 700. Any amount above that number is generally sufficient to qualify for the lowest available rates on most types of loans, but it is not a one way ticket to being able to take out extraordinarily large loans-your income will have a more significant effect on that.

A few credit score points can mean the difference between a good mortgage rate, a lousy one or getting a loan at all. But take heart — If errors are dragging down your score, you can get them fixed, just in time for your much-anticipated closing.