From Diablo Wiki
Villagers are NPCs located around towns]. Some have conversations which you can listen to by selecting 'Talk' once you have clicked on them. Listening to some conversations can earn Achievements. None of the conversations with Villagers count towards an achievement.
Tristram used to be such a wonderful place to live. My family has been here since the town grew out of the ruins of Old Tristram. But now... it's horrible. The loved ones were buried and grieved over now threaten our lives.
I heard what you did down below. I hope that demon filth is terrified of you.
- Demon Hunter: Their masters terrify them far more than I ever will.