Our definition of selling:
Selling is the process of converting a prospect who needs your products and services into a customer.
If you consider your website to be an extension of your selling process, a blog should be considered the hub of your online marketing process. This will help you understand the role of the blog. We have a very simple definition of marketing:

HEY! NEWSFLASH! Nobody reads your blog! It's not THEIR fault? Who wants to read about plumbing experiences, my latest dental exploits, what's new in the world of landscaping or heaven forbid, what Google did yesterday to screw up your SEO results! So why blog?