The major and primary purpose is to provide security. They provide access into and out of a space. They control access to the doorway. Provide protection against potential threats such as burglars, intruders, and even natural disasters. Many doors are equipped with locks. Ensures privacy by preventing unwanted attention from outsiders. Allows the inflow of positive energy for the well... https://connect.garmin.com/modern/profile/839259e8-8503-4b35-b7e6-788f641771a1