知らせ
しらせ · shirase · JLPT N3 · noun
notice
📢 知らせ = shiru (to know) + -ase (make/let): a thing that lets you know
From 知らせる, the causative of 知る (to know): literally to make someone know. The noun 知らせ is the thing that does that job: a notice, news or word of something. お知らせ is the polite form seen on announcements.