Which type of piping tips are commonly used for the majority of cake decorations?

The use of both star and plain/straight tips is essential in cake decoration due to their versatility and ability to create various designs and textures. Star tips are known for their ability to create beautiful, textured designs such as rosettes, shells, and borders. The star shape allows for more dimension in the icing, giving it a professional finish.

On the other hand, plain or straight tips are indispensable for smooth piping, creating clean lines, and filling in areas of a cake with a more refined appearance. They are often used for writing and for making borders that require a smooth, clean edge. Their simpler design is ideal for tasks that do not require texture but rather a polished look.

Together, these two types of tips cover a broad range of decorating techniques and styles, making them staples in any baker's toolkit. This combination allows for creativity and flexibility in cake decorating, catering to a variety of designs and preferences. Other choices do not encompass the essential and widely used capabilities of both star and plain tips as effectively.