Click-Per-Action networks are places where you can go to sign up to promote various offers. Every time you find somebody who clicks through to the offer, you get paid. It's a fast and easy way to make money with online marketing.
One of the easiest ways to promote CPA offers is through social media, such as Twitter. You don't even need to use your own Twitter account or promote these offers to your own followers. It's far easier simply to buy sponsored Tweets from established Twitter...