Blog is also known as an online diary book which usually comes in a form of a website created. Admin of a site can add postings from time to time it also include photos, text and make like a forum. They are in different templates, designs, background colors according to the user if what would she choose. There are some websites like blogger.com which is owned by Google it allows you to choose blog address and control your blog and post messages on to your bog. Other web users can subscribe to your blog and you can edit or control the comments.