notification bar; status bar
Refers to a UI element on smartphones or computers that displays notifications, alerts, or system status.
通知バーに新しいメッセージが表示された。
A new message appeared in the notification bar.
通知バーを下にスワイプして設定を開く。
Swipe down the notification bar to open settings.
Compound of 通知 (notification) and バー (bar), a straightforward modern loanword-based term for a UI element.