A Wordpress site is made up of "blog posts" and "pages." Creating and editing a blog post or web page in Wordpress is almost exactly the same, with only a few differences in how they are configured.
Blog Posts are for publishing "what is going on" or "what happened" or "a lesson" or "a tutorial" or a series on baking cakes, etc. New content is usually regularly posted to a website/blog as a blog post and so it is referred to as "dynamic" content.
Pages are more like "about" pages: "introduction to this website", "about this organization", "about this area", "about the author", "contact us" etc. Once written, these pages rarely change so they are called "static" pages.
Both pages and blog posts can contain: images, sound files, and videos embeded within them.
When you first access your blog from the administrative "backend" you see the following layout. To add a new blog post, click on the "Add New" link on the left under "Posts" (circled in read in this example.) Note: as you can see, you can also click on "Edit" to edit a post that you already created. Also note: to create and edit pages, further down on the left is a "Pages" menu with "Add" and "Edit" options also.
Below is a picture of "Add New Post" screen in Wordpress. (The "Add New Page" screen looks almost exactly the same.) Here you can type in a title for your post at the top, and the text of the post at the bottom. There are common word processing buttons available for editing the text such as: bold, italic, bullets, etc. Additionally, there is a "link" button for adding a link to another page (run your mouse over the buttons to get a description of what each one does.)
Important: you can "cut-and-past" your text from a word processor if there is little formatting in the text. BUT if you do it from Microsoft Word, OpenOffice, Wordperfect, and it has lots of formatting in it, it can potentially "kill" the ability of your webpage to even be accessed on the Web, or cause it to have very strange formatting errors! This is because those word processors were not designed for the Web. The Web speaks HTML. These word processors add lots of proprietary formatting that only they understand.
If you want to use a word processor first before posting, consider doing one of the following:
This only applies to Blog Posts - Pages do not have tags or categories.
To the right of your text editor is a place to add "tag words" or key words that describe the main ideas of your post. This particular post is about a meeting, so the "meetings" tag word was added by pressing the "add button". Try to choose main thought tag words that can be reused as tag words on other posts you may do. This will reduce the number of key words and make a "tag cloud" a more valuable asset to your website.
Note: a single post can have multiple tag words assigned to it.
On the bottom right of the screen above you see "Categories." This website already has a number of categories set up and organized with sub-categories. For this post the sub-category "Mt Kenya - Mbuinjeru" was added to the category "Meeting Reports" and this particular post is "check boxed" to show up in the "Mt Kenya - Mbuinjeru" sub-category."
Note: a single post can be assigned to multiple categories. Also, it is best to assign it to sub-categories because the main category will automatically recognize the sub-category content under it.
Categories end up being a great navigation method that when you click on a category, all the posts within that category will be shown.
The same is true for "tag" or "key word" cloud. It is called a "cloud" because the more posts using a particular tag word, the larger the word becomes within the "cloud."
Note: As is shown in the post below, you can further learn how to add an image to your blog post or page.