What is this thing called blog?

I have decided to create a blog spot. What does that mean? Does it mean that I have become what I have feared, a true dependent upon the computer system that entwines our current universe? Do I now list among the millions who are internet dependent? Am I to be counted with those who I have...sadly, but truly...belittled in my pea-sized intelect? Will I indeed become a sad, lonely girl who spends her nights and weekends reconfiguring the blog spot that she has created for the sole purpose of staying connected with her friends and family?