Pest proofing refers to the process of taking measures to prevent pests from entering a building or property. This can include sealing off entry points, such as cracks and gaps in walls, windows, and doors, as well as implementing measures to deter pests, such as installing screens, using pest-resistant materials, and maintaining cleanliness and hygiene. Pest proofing is important to prevent infestations and damage caused by pests, as well as to protect the health and safety of occupants.