You can make money with pay per click advertising by using it as a way to bring customers to your website. You can choose how much you want to spend on a monthly basis and also how much you are willing to pay for each time someone clicks on your ads. An advantage of pay per click advertising over traditional advertising like tv or radio is that you are not paying for impressions you are only paying when someone see your ads actually clicks on it. This allows you to target the exactly the people you want and if they are not interested then they don’t click and you don’t pay.
A down side to pay per click advertising is that it can get very expensive per click if there are a lot of competitors.