If you have ever bought groceries or read magazines, the chances are huge that you have encountered discount coupons in your life. With the advent of online shopping today, this remarkable way to save money on purchases has also gotten an upgrade in the form of online coupons and coupon codes.

What are coupon codes? Basically a coupon code is a combination of numbers and letters, which when entered on certain online shopping sites, will allow you to avail of various discounts and promotional offers.

In short, coupon codes give you the same benefits as your typical coupons –without the nasty paper cut.

What you have to understand is that coupons can actually be equaled to an advertisement. It is a means to draw in more customers. After all, which company would you buy from: the one that offers a discount or the one that doesn’t?

Even though a company may lose about 10 percent of profit from customers using coupons to buy products, the inflow of new customers attracted by the discounts more than make up for the loss. Coupons help a company grab a larger piece of the market pie.

There are also several shopping sites that attach coupons directly onto a ready-to-buy “shopping cart”. This makes shopping so much easier for a customer. However, this may also prove dangerous as the items contained in the pre-filled shopping cart may not be needed by the customer and these items may also not be considered in a person’s budget.

How exactly are coupon codes used? A typical discount coupon is presented to the cashier when making a purchase, right? The cashier enters the discount coupon into the register as a purchase item. However, the value of a coupon is entered as a negative number or a deduction against your purchases.

Coupon codes work pretty much the same way. However, the verification process is faster. This is because the code actually activates pre-stored information on a shopping site’s database. This information allows the code to be deducted from your purchases quickly.

Like any other promotional item, you have to make use of coupons wisely or you might end up getting the worse end of a deal. Always read the fine print to see if the coupon really does offer you a great discount or if it will only make you buy something you don’t need –albeit at a discounted price. Remember: making use of coupons is smart, as long as you do not let the coupons dictate your purchases. So go and shop wisely.