Know your options: Google AdWords.

Google AdWords trades on its very large and growing network, including Google and AOL, and on its unique ranking system means that ads can gain in position without necessarily increasing the Pay Per Click or by having a high click-through rate. Google Ad Words has precise requirements for ad placement, as well as a thorough editorial review process and fraud detection process. While AdWords's requirements may seem to make ad creation challenging, you can make unlimited changes free of charge, and it costs only $5 to open an account, and bid minimum is 5 cents. The huge network, low set-up costs, the support of a range of keyword types, and the other support and advertising tools offered by AdWords may make it worth it to you to learn the system's specific requirements. Don't forget to look at their PPC analysis tools as well because they will help you manage your campaigns more effectively.