If you don't know what it is, its this 4 letter code system thingy that's like personality stuff so you can be an Introvert or an Extrovert (I or E), iNtuitive or Sensing (N or S), Thinking or Feeling (T or F) or P or J (Judging or Perceiving) so basically you can make 16 combos that are the following: INTP, ENTP, ENTJ, INTJ, INFP, ENFP, ENFJ, INFJ, ESTP, ESFP, ISFP, ISTP, ISTJ, ESTJ, ISFJ, or ESFJ with the most common being ISTJ/ISFJ and the least being INFJ The first slot (I or E) defines how you get energy. Do you get energy from being around people (Extrovert) or being alone (Introvert)? Ambiverts exist, but not on the spectrum The second (N or S) defines how you observe the world. Do you observe the world through your brain (N) or hands-on? (S) The third (T or F) defines how you make decisions at your core. Do you follow your feelings/heart (Feeling) or do you use logic (Thinking) (NOTE: Thinkers can use their feelings and vice versa, its js what they do at the core) And finally the last one (P or J) is how it's all organized. Are you more spontaneous or disorganized (P) or organized and punctual (J)? yes I did an entire speech on this once don't judge me T_T also I know it's in the skool bios, and some people can put them on their bios i just wanted to throw this out there lol for people who didn't know what the weird 4 letters in someones bio were