Soffit vents are openings located under the eaves of a roof that allow fresh air to enter the attic space. They play a crucial role in maintaining proper ventilation, helping to regulate temperature and moisture levels. This ventilation helps prevent issues like mold growth and ice dams during winter. By facilitating airflow, soffit vents work in conjunction with ridge vents or other exhaust vents to create a balanced ventilation system. This system ensures that hot air can escape from the attic while cooler air enters, promoting a healthier and more energy-efficient home environment.