What is the Blog used for?

The blog is a great place to to do informal writing that you may or may not want to share with others.  You can use your blog as a private journal that you don't publish at all. Or you can work on entries privately until you feel they are ready to share, and then publish them.

If you wish, you can tag your entries with keywords so that others can find them more easily. You can also choose whether to accept comments or not.

In short, the blog is what you make it.