There are a few reasons why your dog might lick your face. They could be trying to show you affection, or they may be trying to get your attention.
If you think your dog is licking your face too much, you can try to train them to stop.
Some dogs also lick because they enjoy the taste of salt on human skin like tasting new food.
Whatever the reason, your dog is probably just trying to show you how much they love you.