B2B marketing refers to ‘Business To Business’ Marketing  , this is applicable to businesses that offer a product or service to another business or organisation.  For example, an accountant who works with businesses or a company that produces software for businesses. 

Since it is businesses marketing themselves to other businesses, there are often different methods of marketing that are more effective than B2C marketing strategies. 

 Related Article: 'What Is The Difference Between B2B And B2C Marketing?'

Simply put, the overall goal of B2B Marketing is to develop effective strategies  that make another business or organisation choose your business product/service over your competitors.