Blogs posts are like instant messages to the web. Others are collaborative efforts based on a specific topic or area of mutual interest.
Some blogs are for play.
Some are for work. Some are both. They help small groups communicate in a way that is simpler and easier to follow than email or discussion forums. Use a private blog on an intranet to allow team members to post related links, files, quotes, or commentary. Set up a family blog where relatives can share personal news.