As with all forms of performance marketing, you can’t just throw up an ad and it will perform perfectly from the get-go. To be successful you have to make data-driven decisions and not just go with a gut feeling. All CPC affiliate programs and networks provide reporting, and it is essential to regularly check the data.
From the reports, you will be able to identify which ads are working best and which are not. It is vital to always be A/B testing to find the best performers and eliminate the non-performers. Your optimization could include simple things like testing different CTAs (Calls to Action), and different placements on your site. You may find that a particular format such as a 728×90 banner gets amazing CTR when placed above the fold of your pages but doesn’t perform when it’s near the footer.