What is a blog?

What is a blog? This question has puzzled my mind. A blog. Hey! I wanna write a blog! was my thought. So, I set it up and went to make my first post and this is where i thought..what is a blog. What do I write about? What if my past attempts at blogs follow through with zero followers? I am stumped. So I sit at my cumputer desk, my hands tapping the keys on the keyboard..thinking. And now im sharing my inner thoughts with you! So as i travel, think, dream, imagine, eat, design, and pretend, you can do it with me. Maybe this isn't what a blog is supposed to be but, its my blog. So, Welcome aboard.