People write blogs as a way to express themselves and their knowledge or expertise. People read blogs as a source of information or because they find the writer interesting. Blogs are extremely useful, both to the writer and the reader. The writer may have a lot of knowledge to share, and the reader may want an informal way to learn about a topic. Some people use blogs to find other people with similar problems, issues or situations. Blogs can be anonymous, which helps a lot of people share information without being known. Some people like to state their feelings.