A blog main source of revenue is in most cases by advertising. However, to know when to add ads in your blog can make a big difference to the growth but also to the authority of your blog. Blog advertising can be in different forms. Below are listed the most common forms of advertising used by blogs. PPC (Adsense, Bidvertiser, and Chitika) In Text (Infolinks and Kontera) CPM (Usually banner ads such as Adtegrity and ...



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