You should be aiming to have content on your sites which is informative and unique.
You are also looking to get a high position in the search engines, which will send people to your site.
You can use AdWords to send people to your site, but Google is cracking down on those types of sites that are using arbitrage as a primary business model.
The best thing to do is create unique content, not PLR, and add it to your site often.
This combined with a good link building strategy will get you organic visitors through the search engines.
When you have visitors to your site, they will want to read the material you have, and if the ads are relevant they will click through and each click will earn you some money.
But, and this is a very important but, you can't ask people to click through your ads.
Unlike when you are selling a product and you recommend it to your friends and family, if you do the same with AdSense you could have your account terminated.
You could earn some money with AdSense and the normal advice is to make many of these sites to earn you large dollars.
It is easy to rinse and repeat with the AdSense formula.
Quality is always the way to go, and having great information will take you ahead of the competition.
The advantage of AdSense is that it works equally well with a static site as well as a blog.
You will find a plugin for AdSense to make it easier for you.
When you create a blog, you will find it easy to add posts to the site, and have feeds which bring content to your site.
You will be having fresh content delivered daily to your site, and then you will see more and more regular visitors to your site.
Once you have signed up for an AdSense account, you can immediately add the relevant coding to your site.
The other advantage of AdSense is you don't have to spend time researching products; you let AdSense do all the work for you.
The ads are decided by the information on your webpage, and your readers will be guided to another site from your site.