You can easily interpret thoughts, actions, and body language. You can also  understand other people situations

.You gain proficiency in insight

.As an action, you can interpret a creature's current emotion. The creature can use its reaction to hide its emotions, making a deception check against your insight. Your insight check is made at advantage, for this opposed check.

.When a creature you can see makes a wisdom save, you can use your reaction to subject yourself to the same effect. Then, both you and the creature you saw make the save, have advantage on the save.