what is a blog??

i was just reading the mangonation blog the other day and that's when i thought to myself whether my blog is a blog?? i mean, there they have reviews and views and lots of really cool stuff. and i have sad, long stories. yelch! what should i write about in my blog. yes, owner of mangonation, i'd like some help here. alright, that's all i have to say. for now.