If you are going to start a blog it means you also want traffic on it. Google Blogger (blogspot.com) has top ranking in search engines even it is in top 10 web sites of world. Each blog on blogger.com is a sub-domain of blogspot.com. Google bots visit regularly blogspot.com and index all pages and posts. I have noticed that some time my posts on blogger blog are indexed in just few minutes. If you have written good content it is guarantee that you will take a nice position on internet through blogger blog.
