PTC or "Paid to Click" websites, pay users to click on certain advertisments and view them for at least 30 seconds. After that, the user will earn whatever the payment is for that ad. These payments are usually 1 cent per ad view.
The Advertisers use PTC websites to gain traffic and leads to their websites. Basically they pay the PTC websites to post their ads for the users to click on. Part of the money paid by the advertiser to the PTC site goes to the users who clicked on the ads. The advertiser gets to choose how many users they want click their website link and view it. The more users they buy to view their site, the more they will have to pay to the PTC website.
In the end everyone benefits from this sytem. The advertiser gets more traffic, the PTC site gets money, and best of all YOU get money!
Another great thing about PTC websites is that you can refer other users and make a profit of what they earn. This is where the real money comes from. For example; if you refered 100 people to a PTC site and they all together earned $100 dollars, you would earn a percent of that $100. The More referals you have, the more you will earn. The more your referals earn, the more you will earn. You will not make that much money if you dont refer others. Referrals are what will make you some decent cash.
You can refer people by using social network sites, chat rooms, friends and family, or set up a blog or website such as this one.