We can’t stress the importance of this enough. Effective PPC campaigns use keywords that are competitive and popular. Remember, you’ll be shelling out money to put on ads, so your keywords have to be high-intent; meaning, the people using those keywords are the ones most likely to follow through on their action. They need to be specific and targeted, while at the same time allow flexibility.
Paid advertising — this method requires an effective combination of ad copy, graphics, and a highly-clickable link. Unlike more traditional affiliate marketing strategies, paid advertising (through pay-per-click ads) earn you money regardless of whether a reader buys the product or not. Services like Google's AdSense make this quick and easy for you, and can even supply you with an advertising code.
For example, if I talk about how cool a product is, and then you find out that I’m an affiliate for them, wouldn’t you as a conscientious observer become skeptical as to whether my information is biased, if perhaps I’m only saying how cool something is because I can get paid for it? Wouldn’t that make you question my integrity with other things I say as well?
Focus on reviewing products that fall within your niche. Then, leveraging the rapport you have created with your audience and your stance as an expert, tell your readers why they would benefit from purchasing the product you are promoting. It is especially effective to compare this product to others in the same category. Most importantly, make sure you are generating detailed, articulate content to improve conversions.