Blogs are used for many different reasons. Some are used for personal reasons. People like to post information about their hobbies and provide information to others. Some people use blogs as a marketing tool. If the blog has information on it, there could be a link for others to purchase things related to the topic of the blog. Finally, blogs can make money for their owners of the blog.
This is done by having a large number of people come to the blog site on a consistent basis. To do this, they must have important and popular information on the site. The biggest blog on the Internet is the Huffington Post which acquires fourteen million dollars per month. This site makes the most money.