The first line is nearly the wording of 11:13.
Quick answer
Someone who carries other people's business will carry yours. The second line adds the tell to watch for, and it is flattery.
Read both lines
The connection between the halves is the useful part, because on the face of it flattery and gossip are different vices. The verse links them, and the logic is that both treat a person as an instrument: one flatters to open you up, the other repeats what came out. So the practical instruction is not to spot the talebearer after the damage, which is easy and too late, but to notice the flattery before it. The first line establishes the pattern as habitual, someone who goes about, and the book made the same point at 11:13 by contrasting him with a person of faithful spirit who conceals a matter.
Related: Proverbs 11:13 · Proverbs 26:20 · Proverbs 29:5 · Proverbs 16:28
New King James Version®, Copyright © 1982, Thomas Nelson. All rights reserved. Full copyright information. Scripture provided by API.Bible.
Go Deeper
If this verse has been used to put weight on you that it was never carrying, ask about it directly.