Wetlands are areas of land that are saturated with water either seasonally or permanently. They are characterized by unique soil conditions and vegetation that are adapted to thrive in wet conditions. Wetlands play a crucial role in ecosystems by providing various ecosystem services such as water filtration, flood control, habitat for a diverse range of plant and animal species, and carbon storage. They also help in maintaining water quality, regulating climate, and supporting biodiversity. Overall, wetlands are essential for the health and functioning of ecosystems.