Google has a great range of products to help you in business.
You can advertise your products on Google Base, use Google Checkout to add an online sales capacity to your business, use Google Analytics for your website analysis, and direct customers to your business using Adwords.

Most of use dont see this side of Google, but it is very strong and can provide a lot of benefit to the small business owner.
Of course, for mid to large businesses you can always add the Google search facility to your system to increase efficiency.