How to delete messages

I have a few messages (notifications) and would like to delete them, but don’t see how. What do I do?

Under the messages, there is an ellipsis icon (“Show more”):

Inside, there would be a pen tool (allowing to edit), and a trash bin tool for deletion.

However: why would you want to remove them? Every question (and answer) could help others’ there’s a value in keeping them on this site.
You mentioned “notifications”. If it’s the notifications that annoy you, you may disable them individually (using respective tool at bottom):


Or in your account’s preferences.

I’m asking about the notifications. The Ellipsis does not have a delete or archive function.

The notifications don’t annoy me, but I don’t want tons of message building up over time. I expect that I could archive or delete them.