Are you curious about the four-letter codes that you see on Tinder profiles? Each code represents a specific combination of four traits: Extraversion (E) or Introversion (I), Intuition (N) or Sensing (S), Feeling (F) or Thinking (T), and Judging (J) or Perceiving (P). Understanding these personality types can help you find better matches on Tinder. Listing your personality type on Tinder can provide valuable insight into who you are.