Facebook introduces Link History, a feature that tracks users' clicked links within the app for up to 30 days. It aims to personalize ad experience by using the data to show targeted ads. Privacy concerns arise as some worry about potential tracking beyond Facebook. However, Facebook assures that Link History won't be shared with third-party companies but can be used for its own advertising. The feature is optional, allowing users to turn it on or off and delete their Link History data at any time.

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