What it it?
Fraud is intentional deception for gain.
What does it look like?
Getting a fake email asking for a reply, buying something online but never receiving it, paying for a kit for an 'easy' job at home.
How to avoid it....
Never give your personal information to someone you don't know over the internet, don't reply to emails from someone you don't know, be able to realize when somethings to good to be true, look at costumer ratings for something.