A product line extension refers to the strategy of adding new products to an existing line to attract a broader customer base. This can involve variations in flavor, size, or features of the original product. For example, a company like Coca-Cola may introduce new flavors of its classic soda to appeal to different tastes. This approach allows businesses to leverage their established brand reputation while meeting diverse consumer needs. By expanding the product line, companies can increase market share and enhance customer loyalty. However, it is essential to ensure that the new products align with the brand's identity and quality standards.