For NEW information, it’s best to use 2-way communication first.
This allows for feedback, dialogue, and immediate clarification if the information is misunderstood.
And if your message might be perceived as “bad” news, it’s absolutely critical that you use 2-way communication to announce it.
Examples of 2 way communication: town halls, staff meetings, huddles, one-on-one meetings
1-way communication is only SUPPLEMENTAL. It can reinforce your message after you’ve used 2-way communication to make your announcement.
Examples of 1-way communication: emails, letters, memos, posters, screen savers, digital displays