[niftich]

There's a difference between advertising and branding, although sometimes they blur together.

In brief, advertising is trying to get you to buy a specific product, whereas branding is about mindshare. When Coca-Cola runs TV commercials, you're seeing branding, and you're associating Coca-Cola with energetic, smiling people living life to the fullest and all that good stuff.

Advertising, however, has a clearer call-to-action. In the US, car commercials seamlessly combine the two where they show people like actor Matthew McConaughey driving a Lincoln, and you think 'wow, successful people drive Lincolns' -- branding -- and at the end, they show current offers for leasing the car for 36 months -- advertising. What you propose actually happens in grocery stores today: sales. The rotating sales are a way to gauge market loyalty to a particular brand not currently on sale, vs. the other brand currently on sale.