2: Get quality traffic for your website

Depending on what kind of traffic your website gets, you will get higher or lower CPC. Google counts everything from the time a user spent on site, to how much they scrolled, how many pages they visited etc. Also, someone that comes directly from Google's search engine to your website will always be more interested in your content than someone that came from a post they've seen on Facebook for example.
3: Change the colors of your adsense ads to match closely you webs

Change the colors of your AdSense ads to match closely your website, so if your website colors are white and red, you should edit your AdSense ads to have a white background and red title. The key is to do A/B Testing and see which colors are performing better, some people myself included have better CTR by just using the default AdSense white and blue colors with just the font style changed.
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