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'''CPA''' (Cost Per Action) represents an advertising campaign pricing model which earns income based on direct results. Other advertising campaigns pay for a given number of impressions ([[CPM]]) and even for a given number of visitors ([[CPC]]). Some of the most used forms or CPA are : affiliate and referral programs. If we take banner ads, the CPA represents the cost the advertiser pays to the website publisher every time a specific user-action is initiated. <ref>[http://www.investorglossary.com/cpa.htm CPA definition]</ref>

'''CPA''' (Cost Per Action) represents an advertising campaign pricing model which earns income based on direct results. Other advertising campaigns pay for a given number of impressions ([[CPM]]) and even for a given number of visitors ([[CPC]]). Some of the most used forms of CPA are affiliate and referral programs. Using banner ads as an example, the CPA represents the cost the advertiser pays to the website publisher every time a specific user-action is initiated. <ref>[http://www.investorglossary.com/cpa.htm CPA definition]</ref>

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