What is the key benefit of using signature syrups in Starbucks beverages?

The key benefit of using signature syrups in Starbucks beverages lies in their ability to create unique and recognizable flavors. These syrups are formulated specifically to enhance the taste profile of drinks, allowing for a diverse range of flavors that can appeal to a variety of customer preferences. By incorporating signature syrups, Starbucks can offer innovative beverage options that stand out in the market, foster brand loyalty, and provide customers with a memorable experience. This emphasis on flavor differentiation is a crucial aspect of the brand's identity, contributing to the overall quality and uniqueness of their offerings.

The other options focus on aspects like calorie content, ease of preparation, and cost reduction, which are not the primary objectives of introducing signature syrups. While they can enhance beverage variety and enjoyment, the flavors created through these syrups are central to what sets Starbucks apart from competitors.