blogging

it's been a while trying to find an answer to many questions about blogging like is the blogging a press? or is it like what my friend said it's like jersa
or it's more look like writing diaries and thoughts ?
today I found "Egyptian observer" wrote a blog because it's been 25 days sens the the detention of the Saudian blogger Fuad elfarhan honestly I like what he wrote in the post entitled "why we blog?" and mentioned 25 reason for why we blog.