what is a zip 4 code and how is it different from a 5 digit zip code

what is a zip 4 code and how is it different from a 5 digit zip code

what is a zip 4 code and how is it different from a 5 digit zip code. There are any references about what is a zip 4 code and how is it different from a 5 digit zip code in here. you can look below.