TAILOR MESSAGES TO DIFFERENT AUDIENCES

As both a charity that provides health care and an advocacy group, Planned Parenthood tries to reach audiences as diverse as hardened Capitol Hill watchers and teenagers seeking birth-control information. Under tax law, all messages that express opinions about political parties or candidates must be sent from the group’s advocacy arm, the Planned Parenthood Action Fund.

The organization used to try to reach everyone with a single Facebook page and one Twitter account. As