‘Facebook has made changes that allow political campaigns to target any of their 189 million monthly users in the United States, using personal information provided to the site and derived from clues that come from how users behave, such as shopping habits.
“We are guaranteeing you will reach the right person at the right time and eliminate the waste that you might find in email marketing, certainly in TV advertising,” Eric Laurence, who is in charge of political advertising on Facebook, told National Journal. “That’s really the power of Facebook targeting.”
Campaigns can upload a voter file and Facebook will send targeted ads to those users. For instance, those who have given money to a campaign might be asked to give again, while those who merely clicked on a candidate’s link might be asked for an email address.’