A freezer is an appliance used to store food and other perishable items at very low temperatures, typically below 32°F (0°C). It works by removing heat from the interior, allowing food to freeze and remain preserved for extended periods. Freezers can be standalone units or part of a refrigerator, and they come in various sizes and styles. Freezers are essential for maintaining the freshness of items like meat, vegetables, and ice cream. They help reduce food waste by allowing people to buy in bulk and store items for later use. Common types of freezers include chest freezers and upright freezers.