The document discusses different strategies for brand extensions, including line extensions, category extensions, sub-branding, and co-branding. It provides examples of each strategy and highlights key considerations for successfully extending brands, such as evaluating the fit between the parent brand and extension, designing marketing campaigns, and assessing the impact on brand equity. Research findings indicate that the appropriateness of using a brand extension versus a new brand depends on factors like consumer knowledge and the perceived fit with the parent brand.