Pay attention please.

Meaning: This is a polite way to ask someone to give their full attention to what is being said or done. It's like saying, Could you please focus on what I'm saying?

Choice of Words: Pay is a verb that means to give or hand over something in exchange for goods or services. In this context, it means to give one's attention or concentration. Attention is a noun that means the act of concentrating on something. Please is a polite word used to make a request.