a free bit of advice

A suggestion, opinion, or piece of advice that was unrequested or unsolicited by the recipient. Allow me to give you a free bit of advice, my friend: don't say something you'll end up regretting later. I know you're worried about your kids, but here's a free bit of advice—you can't protect them from every little thing. Hey, here's a free bit of advice for you during your internship—always be kind and polite. People remember if you treat them well.