If you are a business that sells to other businesses then you will need to have a different marketing strategy to a business that sells direct to the public. Some parts may overlap but your overall focus will probably be quite different. The buying cycle is usually longer for business to business sales, the requirements are better defined, more people are involved and the stakes are typically higher.
When dealing with other businesses you need to make it feel like you are a partner of theirs, working together towards a goal rather than a sales person trying to get them to buy your product. When you’re easier to do business with, your customers feel it. It makes their work more efficient and predictable. You may need to spend more time with business customers and expect a slower process than if you were selling to a member of the public but the rewards are often greater.