Advertisement Storyboards

As I was observing advertising storyboards, I noticed similarities for all of them. Most of the time they are always drawn in colours, often have watercolour style applied to them and they DO NOT have any movement indications of any sort. They are very close to the final animation style (As in the background design looks like the one used in the real ad, the colours applied to the different objects are most of time similar to those of the real ad).

There are also ads which have plain, full colours (not watercolour style).
Here are samples of various ad designs and styles.