Roofing shingles protect your roof from environmental damage. The main purpose of roofing shingles is to protect your home from wet weather like rain and snow. Roofing shingles promote the drainage of moisture from the top of the roof to the ground, preventing water from entering your home. Shingles also protect your home from pests. In addition, roof shingles, which are highly visible, are an important part of the aesthetics of your home.