All Moodle Classrooms are created by default with a forum called Anuncis (formerly Avisos i notícies), located at the top.

NOTE: If you transfer a classroom from a previous course, it may still appear as Avisos i notícies.

This is a special forum in which students cannot participate and which teachers can use to post news about the subject.

The latest posts made in the news forum will appear in the Latest announcements block.

This forum cannot be deleted, but you can hide it.

More info in What is the news forum.