Blogging?

A post to ensure my blog has a start.
What is a Blog?
What is it for?
Who benefits?
Why Blog?
Just a few questions to ponder, is this medium designed to feed the voyeurism of the masses interested in staring through the portholes of people's lives and glimpsing what goes on?
Or does it allow the Blogger the chance to prevaricate, allowing them the ability to exist in a world that differs from their reality. A fantasy land.
I know not the answers to these questions but at least I have written something vaguely stimulating for a first post.