pay attention to sb/sth
idiom.idiom. To watch, listen to, or think about someone or something carefully. You use it when you need to focus your mind on something specific.
idiom. A verbal idiom meaning to direct one's cognitive focus towards a specific stimulus, person, or task.
You must pay attention to the teacher.
If you don't pay attention to the road while driving, you might have an accident.
The diplomat paid scrupulous attention to the nuances of the translation, knowing a single mistake could jeopardize the entire treaty.
Often modified by adverbs like 'close', 'careful', or 'little' to indicate the degree of focus.
Contrast with 'notice' (a brief, often passive perception) versus 'pay attention to' (a sustained, active effort of concentration).
Please pay attention on the lesson.Please pay attention to the lesson.The fixed preposition for this idiom is 'to', not 'on'.