"Designing" play a supportive role in marketing and branding of a product or service. Granted, the marketing of a company and their brand needs to begin with a solid foundation. The marketing and branding is all about creating "differentiators", drawing a line between the competitors and you, a line which is clearly visible and is usually drawn by great designs and creative ideas. It can be normally termed as "Visual Salability" of any product or service. For example Apple ipod is "APPLE IPOD" because of its design and visual appeal.
Marketing makes the market aware of your product or service and make them want to buy it. How marketing do this is the creative part. On the other hand Branding is about making the target want to buy your product over your competitor's by giving your company a "personality" that the audience will relate to.
In these troubling times due to the economy, proper "branding" and "marketing" is critical for companies to position themselves to remain ahead once the economy rebounds. Good design can assist with establishing a unique positioning message for a company. It's important for companies to re-evaluate their message to determine which key word they want to "own" which separates them from others and describes their "brand".
Design is a process for solving or addressing a business challenge in the market. The marketing plan is the guideline that informs the design direction. Ideally, marketing (or more precisely marketing research) provides you with an idea of your target group/market, what they value and what they relate to, what's important to them. The marketer's job with maybe the help of a designer is then to create a marketing message, product design or packaging design that fits the target group so that they can relate to the product, service, or even to the whole brand. So the point is clear that designing play a supportive role in developing brands and marketing of a product or service in a better and creative way.
Sharing here few example of creative marketing. Hope you like it. Enjoy and share your views.