There are only four factors that can impact highly on the profitability of AdSense ad units and they are manageable or within your control if you follow some of the tips provided in this article.
Ad Location: this means the location for your ad units is vital for your success. It is recommended that you place your ad above the fold where all visitors to the site should be able to see your ad immediately before they begin to scroll down. This is why the first ad unit must be put on the left of the page. Put it significantly under the title and below the content.
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The second position you could select is on the bottom of the web page after the article. This means that the visitors who read the article would be able to see it and possibly click on it before moving on; to lead them to an advertisers' website.
Ad Formats: There are many types of ad formats offered by Google and some yield better results than others. You will find that the larger formats are the ones that are easily legible and so they outdo their counterparts, the narrower ones.
The most preferred formats are the Medium Rectangle, Large Rectangle plus the Wide Skyscraper, which means all the other ad format can only be taken into account if there is not enough space for the ones mentioned above.
Ad Colors: Try to incorporate colors that can effectively blend in with your website, eliminating all borders and preferring the use of blue links. These will enhance the click-through-rate, also known as CTR, to give the website an attractive appearance and touch.
Focused Content: The Google AdSense deal with contextual ads. These are targeted ads which are chosen carefully and served by Google, using automated systems that are based on the content of your web pages.
The system looks at the content of your web page for the available keywords in order to give you the advertisements relating to your content; which means that if your content is precise, the right ads will be delivered. It is recommended that you stick to one topic for each article.