The handing of the door refers to the way the door swings when it is opened. This is important because you can’t just “turn it around” if it is ordered wrong in most cases. There is no standard swing on any door, it just is determined by what is the most functionally practical swing for a particular opening.
This is especially true with exterior doors. The outswing doors are more secure in high winds because the door jamb prevents the doors from being blown or forced inward compromising the home in severe weather. They are also more secure from forced entry. Don’t worry about the hinges either because they are special hinges for outswing doors that prevent hinge tampering. Other than the front entry door most exterior doors are handed as outswing. You need to be aware that inswing doors are taller than outswing door due to the door swinging OVER the threshold rather than swinging lower and INTO the threshold. This can be accommodated by “cutting and rerailing” a new prehung door if you want to change from outswing to inswing. If you want to change from inswing to outswing, the height will not be an issue. Trimming and filling will accommodate the change here.
Can you just turn the door around?
No! The thresholds for exterior doors are also different so that water runs away from the door instead of towards and into the home. In the interior door consideration, etched doors have to be built for the design to be properly applied. This is especially important on doors with signage as the lettering would appear backwards.
Not the mention the fact that inswing and outswing doors are different heights. This would certainly cause problems when this pertains to exterior doors. Not so much if it is an interior door except for having the etched design on the correct side of the glassarea.