Wikipedia defines a blog as:
a website where entries are written in chronological order and commonly displayed in reverse chronological order
Simply a blog is a website. A blog differs slightly as it is much simpler to update and run. They are usually driven by easy-to-use management software and are very simple to use. The word “blog” is a portmanteau of “web log” and can used as a noun and verb (“to blog,” meaning “to edit one’s weblog or to post to one’s weblog”).
Can I Write A Blog?
Yes, why not? Can you type an email, a sales letter or story? Then you can write a blog!