Insulation is a material used to reduce heat loss, increase energy efficiency, and provide soundproofing in buildings. Insulation comes in various forms, including foam boards, fiberglass batts, spray foam, and reflective barriers, and is used in walls, attics, floors, and ceilings. Proper insulation helps maintain a comfortable indoor temperature and reduces energy consumption. Shopping for insulation online provides a variety of options, ensuring you can find the right material for your home or commercial building.