Cadillac's portfolio consists of sedans, a crossover, a sport utility vehicle, and a high-performance version of the sedan. the sedans are sold through the cadillac dealer network, but the high-performance version is sold in limited volumes and is not available at all dealers. this difference in availability is an example of how the products within the cadillac portfolio are differentiated by the

This difference in availability is an example of how the products within the Cadillac portfolio are differentiated by the "place" element of the marketing mix.

We can define marketing mix as to put the correct item or a combination thereof in the spot, at the ideal time, and at the correct cost. The troublesome part is doing this well, as you have to know each part of your business strategy.  

Place in the p's of marketing mix is an essential part. You have to position and distribute the item in a place that is available to potential purchasers.