What term describes the approach of leveraging an established brand name to introduce a new or altered product in a different category?

Explanation

Brand extension refers to the marketing strategy where a well-known brand name is used to launch a new product in a distinct category. This differs from line extension, which involves introducing new products within the same category. Duobranding and multibranding are different branding approaches that do not specifically involve entering new product categories using an existing brand name.