by default, the announcement will be sent to all users, but it is possible to edit the list of recipients by clicking on the visible to link
the announcement can be sent by e-mail to the course users (check the Send this announcement by email to selected groups/users box),
add an announcement subject,
write the main announcement using the editor,
add an attachment if desired,
click Send announcement.
Note: since version 220.127.116.11, you can use tags inside your announcements (just copy-paste them). These tags will be automatically replaced by the corresponding value when sent by e-mail or displayed on the platform to users.
Announcements will appear to recipients like this on the platform: