product line extension
noun
MARKETING, COMMERCE ukus(also line extension); (also category extension) [ C or U ] (also product line stretching)
the addition of a product or service with different features, sizes, prices, etc., to an existing range of products:
The company's lack of product line extension has lost it market share.
Both Lysol and Palmolive plan product line extensions.
Product-line stretching not only provides customers with more choice, it strengthens the company against competitive attacks.
[ C ]
a product that is added to an existing range of similar products:
By introducing product line extensions such as new flavours, it is possible to increase the market share even with a mature product.