A blog or weblog is a tool for business people to tell it like it is. You can talk to your audience in first person and explain just about anything you want to.
Business blogs are a great way to provide real life experiences around a product or service. You can provide all the benefits and features of a product one at a time and in depth or summarized with a link on your site for more detail.
It is a great place to post the results of "For More Information" that your ad has a link
pointing to it.
You can talk about personal experiences like the barbeque you held for customers and vendors at your house last week end.
You can talk about an upcoming demo that you plan.
You can get customers to tell their story and post it on your blog. You can interview customers or vendors and post the dialogue.
See our discussion entitled: "A Web Marketing Plan"
There is a lot of freedom in your blog that is not available on your business website.