The primary role of a secondary dressing is to secure the primary dressing in place and provide additional protection and support to the wound site. It helps maintain optimal wound environment by preventing displacement or contamination of the primary dressing. Unlike primary dressings, it is not specifically designed to absorb exudate or provide therapeutic effects like antibiotics or debridement. Proper securing ensures effective wound healing and reduces the risk of infection or dressing failure.

Reference: Wound Care Essentials: Practice Principles, 5th Edition.