By A Web Design
Here is what posts are in WordPress:
To create a new post in WordPress 3.X.X login to WordPress as administrator, by simply entering the url_of_your_website/wp-admin in your Browser. Enter the appropriate username and password {which was provided while installing Wordpress} and then click on Log In as shown in Diagram 1.

Diagram 1
After logging in as WordPress Admin, a Dashboard page opens as shown in Diagram 2.
The Dashboard provides access to different WordPress functions and features.

Diagram 2
WordPress CMS provides three ways for creating a new post. You can follow any one of them to create a new post.

Diagram 3

Diagram 4

Diagram 5
“Add New Post” screen is displayed as shown in Diagram 6.
From here you can, add content to a post, save the post as a draft and /or publish the post.

Diagram 6
First enter the Title of the post in the title text box. In our case, “Using WordPress As A CMS” is set as title as shown in Diagram 7.
While the editor is set to the Visual tab, enter the content of the post in the editing area as shown in Diagram 7. NOTE: You can compose a post while the editor is set to either Visual or HTML view.

Diagram 7
On the right hand side publish box, click Publish as shown in Diagram 8.
This box contains buttons that control the state of your page. The Published status means the post has been published on your blog and is visible for users. Draft means the post has not been published and remains a draft for you. If you select a specific status and click the update page or Publish button, that status is applied to the page.

Diagram 8
“Post published” message is displayed as shown in Diagram 9.

Diagram 9
In the front end of the WordPress driven website, recent post will be displayed as shown in Diagram 10.
NOTE: The Recent Posts Widget displays your most recent posts in the sidebar, making it easy for readers to view what’s new on blog.

Diagram 10
Hover the cursor over the title of the post and click Edit as shown in Diagram 11.
OR
Click on the title of the post to open it into an editable mode.

Diagram 11
After editing the content of the page, click Update as shown in Diagram 12.

Diagram 12
Hover the cursor over the title of the post and click on Trash as shown in Diagram 13.

Diagram 13
“Item moved to the Trash” message is displayed as shown in Diagram 14.
On click of Trash the post gets moved to the WordPress Trash section of Post(s). You can still recover any or all posts from Trashed Posts.
In order to restore a post from the Trash, click Trash as shown in Diagram 14.

Diagram 14
Hover the cursor over the title of the post, Click Restore as shown in Diagram 15.

Diagram 15
The post will be restored back to the list(s) of all posts in WordPress CMS.
In order to completely delete a post it from the Trash, click Trash as shown in Diagram 16.

Diagram 16
Hover the cursor over the title of the post, Click Delete Permanently as shown in Diagram 17.

Diagram 17
The post will be deleted permanently and cannot be recovered.