What is the WP_Post Object?
The WP_Post Object is a container that is used to hold various properties of a post, page, or custom post type (all referred to as posts) that are stored in the WordPress database and can be returned by a function such as get_post() or get_posts(). These functions allow for queries that retrieve posts based on certain parameters.
Within the WP_Post Object
There is a large list of what data can be within the WP_Post Object container. The list is divided into different parameters based on different parts of what makes up a post, such as parameters related to ID, author, date, content, category, or custom field. This can also include meta keys and values. A full list can be found within the codex.
WP_Post Object Role in Page Load
The role of WP_Post Object is very important when it comes to loading a page since it contains the information from the database that is attempting to be queried. It allows themes to use conditional logic which can provide the information and front-end view a developer is seeking to provide the user. WP_Post Object also provides faster page loading times by storing the WP_Post Object data into a cache.
Summary
In summary, the WP-Post Object container provides more specific ways to query and show posts within a WordPress site, in addition to the functionality of WP-Query. The easier and faster it is for users to find what they are looking for, the more interaction there will be on the website from the user, which is always a goal when it comes to web development and design.