This is called retargeting, and it can have a huge positive impact. Google definitely does retargeting on Facebook. You just have to put a Google AdWords retargeting cookie on your Facebook landing page; then your ads can follow those people around the Web.
This is excellent for product launches and affiliate offers. It helps create social proof—many images of your product increase your authority and credibility. This helps to ensure that customers buy from you instead of your competitors.
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