If we are taking about bing, how his business listing important for our business? and what is its benefits
This is similar to Google my Business. If you have a physical location it is definitely worthwhile to do. Virtual businesses need not apply (Same as Google my Business.)
You could list your business in a directory only if there is any count on searches of your niche business. People can search for your services and could look to contact your directly. They could even reach at your business location if exist to know better about your services or products. More likely they prefer to purchase only if you have a online shop and a secure payment gateway like Paypal which care about the buyers. I have seen people searching for local provider in case they need some thing in urgent.