Posts are blog entries that make up your Homepage or Blogroll, they also commonly have a date attached and the ability for readers to leave comments.
Writing A Post
From the WordPress Admin Panel visit Posts > Add New. Begin filling out the blanks of the new post. Below is a short description for some of the more common fields of your post.
The title of your blog post. Along with words and phrases, you can use commas, apostrophes, quotes, hyphens/dashes, and characters.
The toolbar located just above the post content area. The editor provides easy shortcodes buttons to create things like lists, links, stylized headings and paragraphs, quotes within your content. Simply highlight the desired area and click the shortcode button. Note: Many Themewich Themes are also equipped with their own Custom Shortcodes (such as pricing tables, social icons and tabs). See your theme's individual documentation for information on the Themewich Shortcodes.
Post Content Area
This is the blank text area below the title where you write your blog post content. You can also include links, images, and a variety of shortcodes to the post. Just select images from the Add Media button and visit the available shortcodes and options from the WYSIWYG editor.
Visual / Text View
Located on top right of the WYSIWYG Editor, these tabs give you the option to use a visual or text mode within the editor. Visual mode allows you to see the post as is, whereas the text mode shows you HTML code and replaces the WYSIWYG editor with HTML quicktags.
At least one is required and WordPress will automatically assign "Uncategorized" if you fail to select or create a new one. From the right sidebar box select from those already created or "+ Add a New Category" to assign.
Tags are similar to categories, only optional. They are generally more specific than categories, pulling in more detail about what your post entails.
Depending on the Theme you are using, a Featured Image will be displayed as the main image for the post. Follow the link "Set Featured Image" to upload or choose an image from your media gallery.
After completing the post fields and once you are ready, click Publish from the box on the top right. SelectPreview to view your Post as it currently appears before publishing. You can also select Save Draft, to save without publishing so you can continue working on the post later.
You can change the publish date to make the post appear as though it was published at an earlier time or set it up to be published on a future date. Within the Publish box on the sidebar find “Published on: 04/09/2014 @ 19:00” and simply click Edit to change it to a future or past date.
WordPress has more options available than you can initially see when creating a Post. To view all the available options click the dropdown tab in the upper right corner labeled Screen Options.
Those that are checked will show on your Edit Post screen. You might want to select some of the following options:
Allows you to enter a summary of the post that many themes will use as preview text in blog index and search pages.
Allows you to adjust the reader's commenting options for the specific Post. This will override any default Discussion settings that were placed under Settings > Discussion.
Allows you to change the author of the Post. Note: You’ll need to have more than than one user with authoring rights, which can be set up by visiting Users > Add New
For more about WordPress Posting basics, please visit theWordPress Codex