Embargo
An embargo is an agreement that information given to journalists in advance will not be published before a set date and time.
Why use one
It gives journalists time to prepare, producing better, simultaneous coverage for big announcements, reports and launches.
Risks
It is a gentleman's agreement: give it only to trusted journalists, agreed in advance, and mark "Embargoed until date, time" clearly.
Frequently asked questions
What if an embargo is broken?
Lift it for everyone at once and reconsider the relationship with the outlet that broke it.