「朝」 means morning, the period from sunrise until noon. It's commonly used when talking about daily routines, breakfast, or events happening in the early part of the day. Very important for daily life.

日(ひ)の出(で)から正午(しょうご)までの時間(じかん)を指(さ)します。毎日(まいにち)の習慣(しゅうかん)や朝食(ちょうしょく)について話(はな)すときに使(つか)います。