A blog can be used by anyone for anything.
However, what is the one word you kept hearing in that description above? HELP, right?
When you are in the process of deciding whether blogging is for you, and whether you should start a blog, keep these questions in mind:
Are you passionate about helping people understand what it is you know? Are you willing to write blog posts 2-4 times/ week? Are you willing to learn strategies and techniques you can use to make your blog a success?
Summary: A blog is about having fun, communicating with a group of people, sharing your thoughts and listening to feedback from the community, and constantly researching information to keep your audience excited!