Why use a blog?

Finally started using this blog today as thought its a bit pointless repeating the same thing to people in emails when they ask what I'm upto. So thought I can write a brief account here and then if people are interested they can see what I'm upto. Just easier and as I'm lazy the less effort the better! I'll still reply to emails but just won't have to repeat all the same stuff about what I've been upto.Cheerio