The six major categories of nonverbal behavior are:
1. Eye contact
2. Gestures
3. Posture
4. Facial expressions
5. Body movements
6. Paralanguage
Maintaining eye contact is one of the major things that can help to easily and quickly get used to a stranger. It can indicate attention, involvement, or interest. Meanwhile, not making eye contact can mean inattentive, rude, or disinterested.
Posture majorly depends on the position you take while doing anything, majorly sitting or standing. Posture can depict assurance, confidence, strength, or on the other way round; weakness, lack of confidence, or uncertainty. Body movements in several manners can convey different meanings, and it is used by almost everybody, every day.
For example, the nodding of the head can simply indicate agreement. Being sarcastic in expression is a good example of paralanguage. Facial expression is another major category of nonverbal behavior -a means whereby you show what might be the state of your mind.