Publish box
Visibility – This determines how your post appears to the world. Public posts will be visible by all website visitors once published. Password Protected posts are published to all, but visitors must know the password to view the post content. Private posts are visible only to you (and to other editors or admins within your site)

Permalink
Permalink stands for “permanent link”. That means a post URL that does not expose the post ID which could be subject to a change (e.g. when moving to different blogging system), but it rather contains a user-friendly post name derived from the post title which could also change, although not recommended, but in a more controllable way. This post name (also referred to as “post slug” or just “slug”) can be edited, depending on your Permalinks settings, using the “Edit” button. (To change your settings, go to Administration Panels > Settings > Permalinks). The permalink is automatically generated based on the title you set to the post and is shown below the title field. Punctuation such as commas, quotes, apostrophes, and invalid URL characters are removed and spaces are substituted with dashes to separate each word. If your title is “My Site – Here’s Lookin’ at You, Kid”, it will be cleaned up to create the slug “my-site-heres-lookin-at-you-kid”. You can manually change this, maybe shortening it to “my-site-lookin-at-you-kid”.

Save
Allows you to save your post as a draft / pending review rather than immediately publishing it. To return to your drafts later, visit Posts – Edit in the menu bar, then select your post from the list.

Publish
Publishes your post on the site. You can edit the time when the post is published by clicking the Edit link above the “Publish” button and specifying the time you want the post to be published. By default, at the time the post is first auto-saved, that will be the date and time of the post within the database.

Post Tags
Refers to micro-categories for your blog, similar to including index entries for a page. Posts with similar tags are linked together when a user clicks one of the tags. Tags have to be enabled with the right code in your theme for them to appear in your post. Add new tags to the post by typing the tag into the box and clicking “Add”.

Categories
The general topic the post can be classified in. Generally, bloggers have 7-10 categories for their content. Readers can browse specific categories to see all posts in the category. To add a new category, click the “+Add New Category” link in this section. You can manage your categories by going to Administration Panels > Posts > Categories.