Google's main interest with all advertisers is that you get as many clicks as possible. This is good for them, but may not be good for you. That is why when doing PPC, you must target your keywords very carefully to get the results you want at the lowest possible cost.
You need to achieve a certain number of click-throughs in order to maintain your account in good standing. Of course, you can always start a new campaign, but it is best to try to maximize your results from the beginning.
Another important thing about PPC with AdWords is that you need your long-tail keywords to appear in your ad, as well as on the landing page that links from your ad. One additional point of note is that Google is penalizing ebook marketers who use the "search network" as opposed to the "content network." For more on AdWords, see the Pay-per-click (PPC) Module.
If you are lucky enough to get one of your articles high on the list, you will get a fair amount to a very large amount of traffic, depending on the keywords you used.
What is page rank and how does it relate to your keyword research? Google measures the quality of websites and web pages with a measurement device they call page rank. Every website you visit has a page rank that can be seen with the Google Toolbar (refer to the SEO module for details). Page ranks go from 0-10, with 10 being the highest (and extremely rare). The higher your page rank, the more Google values your Web page/site relative to other pages/sites. Sometimes you may see a blank in the rectangle. That means the site is not ranked, which can indicate that the site has been banned or penalized by Google.
Some article publication sites have high page ranks (such as ezinearticles.com PR 6), which gives your articles a chance of getting more highly ranked by Google. If you are lucky enough to get one of your articles high on the list, you will get a fair amount to a very large amount of traffic, depending on the keywords you used.
It is often easy to tell if keywords are competitive by looking at the page rank of the top ranked pages under a Google search on a given keyword phrase. If the page rank of the top results is 2 or less, you have a reasonable chance of getting your article high on that keyword.
