The perfect face shape is known to be the distance from the jawline to the nose, the nose to the forehead, and from the area between the eyebrows to the hairline. It is also known as the 1:1:1 ratio. Essentially the forehead already plays ⅓ of the part of making what is known as a beautiful face.
The forehead is the standard of beauty. A moderately wide, and slightly protruding forehead is also known to be a good form.
A lot of plastic surgery is performed to make a round slightly protruding forehead. If your forehead changes, you can create a better image overall of oneself.
In the case of the area between the scalp and forehead, most men are M-shaped, while women have round-shaped lines. A lot of people who want hairline transplant dislike the wide forehead, so they want to exclusively just lower hairline, rather than matching the hairline with their face shape, but as one gets older, the hairline naturally retreats from its original state, so long-term plans in 10 years are more important than creating a 2-3 year shape.