A "who are you?" quiz is an online test that asks you questions about yourself and gives you answers about your personality, your interests, your work style, your compatibility with others, and other aspects about you.
Generally meant to be fun and entertaining, "Who are you?" quizzes can measure your attitude, your beliefs, your values and your overall character through a series of multiple-choice or yes-or-no questions. It can be interesting to compare to your results to those of friends and others who have taken the same test, and you can usually choose to share your results on social media. The quizzes are developed and shared by average people rather than doctors or counselors and are not meant to be taken too seriously.