If you're going to use a Blogspot blog for business purposes here are common mistakes I often see when people ask me for a free SEO consultation.
You can use a blogspot blog for a stand alone business website but most of the time the reason for having a blogspot blog is to support an existing company website.
If the local competition does not know enough to capitalize on a blog, the net effect is that the existing company website will rank in Google and the Blog will...