Contest/Need Help Fraud
You just won $10,000? No, you didn't.
Fraud- when someone on the internet is trying to trick you with a false ad to try and get info or money.
How to Spot it
If you see a notification that seems pretty trust worthy and asks you to donate to starving kids in Africa, it's probably fraud. If a pop-up asks you for your credit card information saying that you can win the lottery from entering your information, it's probably fraud. Basically if it's not a trusted source, don't click on it.
How to Prevent it
Keep your eye out for fishy charities and lottery pop-ups. If you have common sense you'll be fine.