Body language refers to nonverbal communication through gestures, facial expressions, eye contact, posture, and other physical behaviors. There are 11 main types of body language: paralanguage, gestures, emblems, blocking, proxemics, interest cues, facial expressions, pacifying behaviors, haptics, eye gaze, and ornaments. Mastering body language can help you connect better with others and build stronger relationships by expressing yourself clearly and understanding others nonverbally.