Add documentation for broadcast notification messages
Parent issue: gitlab-org/growth/engineering#2601 (closed)
Follow-up from !21797 (merged) to add documentation how the new notification broadcast message feature looks like and works.
- We also should mention what is accepted in text (
a
andbr
tags, as well as addingclass
andstyle
attributes). Also link to this documentation in our broadcast message form as a helper text on themessage
field. - Add explanation about the difference between broadcast messages and broadcast notifications (banner messages are shown on the UI and git push, but notification messages are only shown in the UI)
- Add documentation about placeholders
Edited by Nicolas Dular