it’s a configuration entity
We can move the content entity in one environment to another .
How to create a content type in Drupal
How to create content type :
Open a structure menu -> under content type -> pick any one mange fields ->
Inside the manage fields we can create new fields like email,comment,image …etc
We can set label name , required or not …etc then save it . and open on a inserted node page and fill the details and save it will show the details which entered the details .