A weblog (blog) is an online journal you can use to share thoughts, ideas, gripes, project status, or anything else you want. Blogs allow you to be a contributor rather than just a bystander.
Postings are arranged chronologically and can be categorized depending upon how the administrator has configured the system. You can view a post by clicking on the title from the home page where all users' posts are collectively shown. Once viewing a blog you can read other posts by that person or provide comments on postings.
Creating new posts is quick and easy. If you have the ability to post you should see a link (usually on the left) on your weblog's home page: new post. Clicking on this link takes you into your blogs administration pages for creating new posts.
If you don't have the ability to post, contact the site administrator and ask for your own blog.
Happy Blogging!