Blogs still allow you to comment on the post but it is less open for discussion like forums. The blog is usually written by one person who has researched a topic on the internet and added information from different sources. Blogs often come from one individual or in some cases, a team of people if it is for business.
“In the context of business communication, these are often used to talk with the marketplace and to join the conversation that existing external bloggers may be having” - Jeremiah Owyang, Columnist for Forbes CMO Network.

