WP Editor refers to the visual WYSIWYG editor of Wordpress.
The WP Editor refers to the visual WYSIWYG editor of Wordpress. Usually, this is TinyMCE, which allows you to manage the content of a certain page or post by easily modifying, creating and managing the content HTML elements in a way similar to most visual editors.
There is also a built in function with the same name - wp_editor(), which can display a custom WYSIWYG editor with certain parameters.