I think currently as an Admin, everything I post sends a notification to all members.
This is great for things that are actually announcements. However, if I want to post and engage as a member myself (memes, interesting article etc), I don't really want members getting all those notifications. They'd get annoyed and rightfully so.
Having an option to toggle on/off "Announcement mode" would be super helpful. Then I have the ability to choose what goes out to all members.