String lights are decorative lighting fixtures that consist of a series of small light bulbs connected by a flexible wire. They are commonly used for both indoor and outdoor decoration, adding a warm and inviting ambiance to spaces. String lights come in various styles, colors, and lengths, making them versatile for different occasions, such as holiday celebrations, weddings, or parties. These lights can be powered by electricity or batteries, and many modern versions are energy-efficient, using LED bulbs. String lights are often hung along walls, fences, or trees, creating a cozy atmosphere for gatherings or simply enhancing the beauty of a space.