A growing number of retailers are using the following Monday after Thanksgiving, so-called "Cyber Monday" to promote online sales.

Cyber Monday is recognized as Internet's largest sales day of the year and the National Retail Federation says it finds that nearly three-quarters of online retailers are planning special promotions that day.

About a quarter of them are offering free shipping on all purchases.

Much of the shopping is expected to be done by consumers who are at work.

If you're planning to shop online for Cyber Monday, the Better Business Bureau offers some tips to keep in mind.

Stick with a budget and only buy what you need this holiday season.

Also compare prices, because some of the savings claimed may not be as great as they sound.

Watch for fraud and never give out Social Security numbers, birth dates or mother's maiden names.

And as with any purchase, find of the return of exchange policy before you order.

Lastly, don't wait for a statement. Check your account, credit card or bank statements for abnormal behavior.

These tips and more from the Better Business Bureau can be found here.