Having a blog for your business is now almost as standard as having a good website. The best thing about a good blog is that it is another way to interact with your customers and potential customers. Blogs can be used for many different things including new products and services, changes to the business (hours, locations, etc.), contests, promotions, and sales and specials.
A blog is also a great place to get feedback from your customers. With a corporate blog you can now do announcements to your customers and they can give you feedback in the comments. This creates a great connection between you and you clients, and any good business person knows that having an open line of communication with your customers means more returning business and great referrals for new customers.
Also a blog is great place to let potential customers ask you questions about your business. When you post a blog about something that is going on with the business it lets potential customers see that there are new things going on with the company and you are very much still in business and moving forward.
Setting up a great professional business blog that matches the tone of your business can really help in many different ways including great Search Engine Optimization (SEO) and also a another great piece to integrate with you Social Media Marketing efforts.