Facebook will be launching new features next week that allow advertisers to target their ads to customers based on contact information that the advertiser has already collected. It’s a way for businesses to connect their Facebook ads with the customer lists they may have built up elsewhere.

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"Facebook To Roll Out Email- and Phone Number-Based Ad Targeting Next Week"

Using "Utility Marketing" to encourage Brand Engagement.  And the amazing example of how travel booking sites are still not serving mobile friendly websites... wow.

Mobile Marketing 2015: Rethink Customer Acquisition, Intent Targeting