"Keto smoothies" refer to smoothies that are made following the principles of the ketogenic (keto) diet, which is a low-carb, high-fat eating plan. These smoothies typically contain ingredients that are low in carbohydrates and high in healthy fats, such as avocados, coconut oil, or nut butters. They are designed to help maintain a state of ketosis, where the body burns fat for energy instead of carbohydrates.