The answer is: It will simply enable you to provide quick updates about your business and will also allow you to put a link back to your profile on any B2B website that you are using, like www.TradeKey.com. Anyone who will click on the link after visiting your Twitter page, will be able to go to your profile on the B2B website to learn more about your company and what you are selling.
Let's say you now have a new product that you want to promote worldwide via B2B website. You will login to your account and post your product details online. You will also be able to create a Sell Offer to define your product in more detail. For example, if your product is available in different colors or sizes, you can create several Sell Offers to promote them all. After you post your Product and Sell Offers, you will be able to attract buyers from around the world to your newly added product.
See, B2B websites provide a complete power pack of trade tools, you don't necessarily need a Twitter account to promote your products, but you can post updates in Twitter about your newly added product. Your Twitter account will also allow you to meet more traders who are already using Twitter. You will be able to reply to their posts, attract them to your Twitter Profile and finally will bring them to your Products page or Company Profile on B2B website through the link on your Twitter Profile.
The bottom line is... It's a great social networking tool that you can use to provide product and business updates in real time. Let the world know what you are doing, how your business is running, what products you are selling, what new products you intend to add to your product catalog, etc. simply by using Twitter to provide updates in 140 characters.