I think that sometimes when someone sees the advertisement they immediately think their life will be better with the thing that they see in the advertisement. And sometimes there are famous people in advertisements and that makes people want the product even more.
An advertisement I think is well done is when it is a bit funny it has a well known person and it is really expensive
I think that what makes it effective are the colors and design you use. You need to use colors that attract people and a design that feels different from other brands and things.
To take creative control over the Shutter Speed, try using Shutter Priority Mode or Manual Mode. By slowing down your shutter speed, you can get some awesome photos of star trails, stretched out clouds, vehicle tail light trails, smooth ocean or waterfall shots, moon trails (yes I said moon trails) and the list goes on.