advise (one) on(redirected from advise them on)
advise (one) on
To share insight or recommendations on a particular topic with a person or group. My lawyer advised me on how to handle my mother's estate. Patrick advised her on the possible issues she should expect during the negotiation process.
advise someone on someone or something
to provide someone with specific advice about someone or something. Would you please advise me on what kind of computer to buy?