You've learned how to speak to the common man, the oppressed and the downtrodden, due to this people feel much more comfortable speaking to you and confiding in you with secrets. Once per long rest you may make a DC15 charisma (Persuasion) check towards a civilian NPC, on a successful check the creature is charmed for 10 minutes making them more likely to show you hospitality and divulge information about their current situation.