Facebook Beacon

Being a part of Facebook Advertising, Facebook Beacon helped the Facebook platform to use its user’s data and send it to advertisers enabling them to target their users much better and efficiently. The service was shut down in September 2009 as the clients found it to be violating user privacy.

Facebook Sponsored Stories

Facebook's highly controversial Sponsored stories were initially banned as it could be misused by several hackers and malicious users. However, the feature was later bought back with several added and innovative guidelines.

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