The phrase "soft palate" refers to the soft part located towards the back of the roof of your mouth. It helps to close off the nasal passage while swallowing and also plays a role in producing certain sounds when speaking.
A congenital split involving the hard or soft palate in the mouth. (yorkiefoundation.org)
Soft palate abnormalities should be treated if they cause distress to your pet, become more severe with time, or cause life - threatening obstruction. (acvs.org)