The document discusses brand extensions and line extensions as strategies for introducing new products. It defines line extensions as modifications within an existing product category, like new flavors, while brand extensions enter new categories. Extensions can reduce risks for new products by leveraging brand recognition. However, extensions must be differentiated from parent brands and satisfy consumers to avoid damaging the brand or creating competition. The document recommends that extensions have attributes relevant to target consumers, be positioned distinctly from parent brands, and deliver a proposition different than the parent brand. Whether an extension will succeed depends on properly executing these factors.