Notice, Notification, Flier
noun, verbal noun
This is a strange word, so you'll have to bear with me. You know that 知 means know. But in the case of this word, what do you know? Look at the second half. らせ sounds a bit like "race." So, you know about a "race." How do you know about this race? You got a notice or notification about it.
おしらせ
Remember 知る? This is the same reading (し). So, if you know that, you'll be able to read this one as well.
お知らせの紙がポストに入ってました。
There was a flier in the mailbox.
お知らせがあります。今すぐ本社に来てください。
There's a notice. Please come to the head office right away.
ここでスポンサーからのお知らせです。
And now a word from our sponsor.
雨で花火が中止になったというお知らせがありました。
It was announced that the fireworks had been cancelled due to rain.