It has been observed that most of the TV advertisement has beautiful models for that product which may not have any connection between beauty and product.
In essence, with advertisement it is indented to produce positive associations with brands or products. This works better with attractive faces than with ugly ones.
In essence, with advertisement it is indented to produce positive associations with brands or products. This works better with attractive faces than with ugly ones.
There are a number of (usually quite old) studies that suggest that source credibility and attractiveness of the persuader are positively related: https://scholar.google.de/scholar?&q=source+credibility
The main reason for advertising a product is to promote sales. Using beautiful models is psychologically justified because love of beauty is a vital part of man's aesthetic tendencies. Accordingly, even ugly consumers inherently like and prefer to see the targeted product used by a handsome or beautiful model.