Cranberries are water-harvested fruits. They are packed with nutrients to help your body ward off infections and boost overall health. They’ve been used to treat urinary issues, upset stomachs, and liver problems. 
They are higher in antioxidants than other fruits and berries, as well as lower in sugar, the reason for their tart flavor.  Cranberries can improve your digestion , may reduce bad cholesterol, can help prevent gum disease, and they can boost your immune system.
Eating them whole gives you  the most benefits!