Blogs are sources that provide information and news, regarding different topics. The term 'blog' is a more casual and popular term for 'Web log'. There are various types of web logs, depending on the kind of information, they provide.

Blog writing or blogging initially began in the form of diaries. These blog types provided personal information as in an autobiography of a person. This requires conscious writing and highlighted important aspects of a person's life, which most people would be keen in reading. This trend highly popularized the practice of blogging.

Blog Post Types:

1. Interviews: Writers often use interviews to learn more about a particular topic, they are working on. Thus, it may not include relevant information, but a general opinion of the public regarding a specific topic. Mostly, one or two questions are asked to get an overview of different responses.

2. Case Studies: It is one of the most popular types of blogs. Web sites include case studies, usually as review posts, where they add certain content information regarding their sites. Many web sites use case studies as a medium to generate income.

3. News Media: These are blogs which display illegal, incorrect, or inaccurate information. Sometimes, they take the content from a media source and make unintentional modifications and omissions.

4. Reviews: Usually, every online product or service has reviews along with it. They contain personal opinions or experiences regarding a particular product. This helps the readers to make a fair choice.