In the WordPress user management system Editor may refer to a pre-defined user role. Users with the editor role have the capacity to write, edit, publish, and delete posts. This includes posts which is written by other users.
They can also moderate, approve, and delete comments. Their privileges increase farther just adding and removing content.
Drawbacks of this role are that it can not access WordPress settings, themes, and plugins areas. They can manage content and even delete it, but only they cannot perform site management tasks.
You can add or remove capabilities to user roles in WordPress. So, if you are not confirm about giving a user this much control on your site you can twist the user role to meet your needs.
While creating a post or page on your WordPress.com blog, you have two editing modes available to you.
1- Visual Editor
The Visual Editor is the default mode for WordPress.com blogs and looks very similar to a word processor. The visual editor icons allow you to format text, change font alignment, insert bulleted and more.
2- HTML Editor
The HTML editor allows you to write your posts in HTML. When you want to add a shortcode, add some font style, or paste in code from an outside source, you can use the HTML editor.