Each letter in the personality type code - I, N, F, and P - describes a preference for a way of thinking or behaving. There are eight styles and you use all of them, but INFPs prefer:
Introversion (thinking things through) more than Extraversion (interacting with people)
iNtuition (perceiving new possibilities) more than Sensing (perceiving tangible facts)
Feeling (making decisions using subjective values) more than Thinking (making decisions using objective logic)
Perception (a flexible lifestyle) more than Judgement (an organised lifestyle)
If your closest personality type is INFP then you have some deeply-held values, though there are probably very few people, if any, who know what those values actually are. Privately, you may be a people-person, but others may not recognise it as you show your feelings in indirect, imaginative ways rather than in more conventional expressions of care. You may be looking forward to the realisation of some personal ideals.
Stereotypes and Individuality
The original author of personality type theory - Carl Gustav Jung - said that everyone is individual and unique. The personality types are not strict classifications, but stereotypes that are akin to landmarks on a map. Just as a few landmarks can help you find many unique locations, so too the personality stereotypes can help you understand your unique personality.