The average cost-per-click advertisers pay for Google ads has been declining year-over-year since the fourth quarter of 2011. The rise of mobile has long been seen as the driving force behind the declining average cost-per-click (CPC) — a glut of new ad inventory coupled with the fact that...
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Please visit Search Engine Land for the full article.
via Search Engine Land: News & Info About SEO, PPC, SEM, Search Engines & Search Marketing http://ift.tt/1oWMCdZ
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