noun, noun which may take the genitive case particle 'no'
needs checking; must-see; requires verification
Used as a noun or no-adjective to label something that requires attention, verification, or is highly recommended to see. Common in casual notes, social media, and informal reminders.
この動画は要チェックだよ。
This video is a must-see.
書類にミスがないか要チェックです。
It needs checking whether there are any mistakes in the documents.