Deffanition: Intentional deception for gain

Phishing & Smishing: A fake message to get someone to reply or download

Retail/Auction fraud: When you thing you are getting what you payed for but actually getting a rock in a box or something

Work at home: People say buy this trial for $9.95 and work at home for high pay

How to avoid this: Do not reply to anybody you do not know and do not open anythign if you don't know where it came from, Common sense if it looks too good to be true it probobly is.