Intentional deception for gain
What is it?
Fraud is when you buy something online and it doesn't come, or they trick you into giving them your security information. A lot of people sell things online and don't ship it. They take your money. They also send emails claiming they are your credit card company and request your information for conformation.
How to avoid
Always order things from trusted places, but if you can't do that, do some research on the place you're ordering from. NEVER send any information over email. Banks and companies will not request for this over email.