what is a product line 
a product line is a group of related products all marketed under a single brand name that is sold by the same company companies sell multiple product lines under their various brand names seeking to distinguish them from each other for better usability for consumers companies often expand their offerings by adding to existing product lines because consumers are more likely to purchase products from brands with which they are already familiar a company s blend of product lines is known as its product mix or product portfolio investopedia mira norian