What does "notifications silenced" mean in Messages?

I’ve been texting with a good friend of mine and all of a sudden at the very bottom of our texting thread it says “🌙 Molly has notifications silenced “. What does this mean? Is she specifically silencing my specific text messages so she doesn’t receive them or the banner doesn’t pop up? She has an iPhone as well and I’ve never seen this message before. My feelings are a bit hurt but I’m not really sure what it means, if someone could explain this to me I would so appreciate it.

[Re-Titled by Moderator]