Countertop microwaves are compact kitchen appliances designed for heating and cooking food quickly. They use electromagnetic radiation to generate heat, allowing for rapid cooking times compared to traditional ovens. These microwaves are versatile and can be used for tasks like reheating leftovers, defrosting frozen items, and even cooking certain meals. Most countertop microwaves come with various power settings and pre-programmed functions for different types of food. They are easy to operate, typically featuring a digital display and buttons for time and power adjustments. Popular brands include Panasonic, Samsung, and Breville, each offering a range of sizes and features to suit different kitchen needs.