Blogging started off as an online journal but has quickly moved on and is now used for various purposes. You can also start your own blog for what ever reason. Blogging has become a popular activity on the net. Most sites especially social networking site offer blogs as a free feature. You can also find loads of free blog providers on the web. Here are some more popular ones:
blogger.com - Owned by Google it also gives you a chance to monetise your blog through Adsense. You can create as many blogs as you like.
wordpress.com - Another very popular and well establishe blog provider. Also offers premium membership with more features.
blog.co.uk - You are allowed to create one free blog but would have to become a premium member if you need more. Monetising you blog is also available.
soulcast - Very open blog provider with no restrictions on content. Beware when reading members' blog.