How creating a blog can help my business?

Yes, a blog can help your business in many ways. Blogs are big part of social media marketing these days. For example you can create and use a corporate blog to "talk" to your customers. Encourage them to write questions or comments on your products and services, and the product features they like or wish to have. A blog is easy to create and maintain. If well optimized it can help your main web site get better rankings on the search engines.