Wetland restoration is the academic and practical field dedicated to recovering the ecological functions, biodiversity, and services of degraded or destroyed wetland ecosystems. This multidisciplinary research area investigates the ecological principles underpinning wetland health, develops methodologies for site assessment and intervention (e.g., hydrology manipulation, vegetation re-establishment), and evaluates the success and long-term sustainability of restoration projects. It is characterized by its integration of ecological science, engineering, policy, and socio-economic considerations. Its significance lies in its critical role in conserving aquatic biodiversity, enhancing vital ecosystem services (such as water purification, flood control, and carbon sequestration), and contributing to climate change adaptation and mitigation strategies.