By Sarah Frier
Published: March 28, 2018 – 4:08 PM PDT
Updated:   March 28, 2018 –  5:52 PM PDT

  • Zuckerberg asking Facebook teams to review data practices
  • Changes could make it harder for advertisers to pinpoint users

Facebook Inc. is conducting a broad review of all its data practices and taking a much more conservative stance on some policies, moves that could limit advertisers’ ability to target users on the social network, according to people familiar with the matter.

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