Meta Boxes

Meta Boxes are groups of settings available beneath the post editor on the Edit Post page in the WordPress admin panel. The settings in each meta box are unique to the current post/page only, and can help make fine-tuning different aspects of the page outside of the main content easy and standardized across Post Types.

The most common example of a meta box is the Featured Image meta box, which allows you to upload the main photo for the current post/page.