It's to help them dig.
a pigs mouth is a technically a snout but, in particular, a pigs "snout" is called a "gruntle"
Pigs snouts are useful for digging.
A pigs 'snout'
snout
Yes, they do!
Yes, they do!
Yes a pid snout is edible and very tasty.
To dig dirt of in the wild
snout
What humans do with their nose?
Yes that's it's nose.
Sharks do not use their nose to breathe like humans do.