Raised bed gardening is a type of gardening where people build raised beds and fill them with soil to grow plants. The beds are usually made out of wood, plastic, or other sturdy materials, and are raised above the ground. This helps keep plants out of the mud, and allows the soil to stay warmer longer so the plants can grow faster. It also keeps pests like snails and slugs away from your plants. Raised bed gardening is used when there's not enough space for a large garden, and is becoming increasingly popular with people who want to grow their own food.