Wetland conservation is aimed at protecting and preserving areas of land including marshes, swamps, bogs, and fens that are covered by water seasonally or permanently due to a variety of threats from both natural and anthropogenic hazards. Some examples of these hazards include habitat loss, pollution, and invasive species. Wetland vary widely in their salinity levels, climate zones, and surrounding geography and play a crucial role in maintaining biodiversity, ecosystem services, and support human communities. Wetlands cover at least six percent of the Earth and have become a focal issue for conservation due to the ecosystem services they provide. More than three billion people, around half the world's population, obtain their basic water needs from inland freshwater wetlands. They provide essential habitats for fish and various wildlife species, playing a vital role in purifying polluted waters and mitigating the damaging effects of floods and storms. Furthermore, they offer a diverse range of recreational activities, including fishing, hunting, photography, and wildlife observation.

Wetlands serve as multifaceted ecosystems with a wide array of essential functions that contribute to both the environment and human societies.

Wetlands can help mitigate the impacts of flooding in areas due to their function of floodwater storage. According to Vermont Department of Environmental Conservation, numerous wetlands, particularly those situated in floodplains, possess the ability to temporarily hold excess floodwaters when there are high runoff conditions. While wetlands have been likened to natural sponges in the past, their role is better compared to that of natural reservoirs. They store floodwaters that spill over riverbanks or accumulate in low-lying areas. As floodwaters gradually subside, these wetlands slowly release the stored water from their soils. This function of retaining some of the floodwaters and regulating the pace at which water re-enters the stream can effectively decrease the intensity of downstream flooding and erosion. Wetlands also aid in water filtration by removing excess nutrients, slowing the water allowing particulates to settle out of the water which can then be absorbed into plant roots. Their vegetation and soil trap sediments and pollutants, while beneficial microbes in the wetland break down harmful substances. In this manner, these invertebrates are capable of removing as much as 90% of bacteria from the water.

Wetlands play a vital role in providing diverse and critical habitats for a wide array of plant and animal species, serving as a cornerstone of ecological diversity. Different species of fish and wildlife utilize wetlands in various ways. Some rely on wetlands as their main habitat, while others use them seasonally for food and shelter. Wetlands are crucial for the survival of many species, while they serve as essential seasonal habitats for others. The synergy of shallow waters, abundant nutrients, and high primary productivity creates a perfect environment for the growth of organisms that make up the foundation of the food chain, providing nourishment for various fish, amphibians, shellfish, and insects. Wetlands have also been a location favored by scientists in aid to the improvement and discovery of medicine. There is an estimated 70-80% of people worldwide who rely on herbal medicine as well as income from harvest and trade of plants due to their medicinal purposes. Although there is no existence of a global inventory of wetland medicinal species, the White willow is an example. This riverine plant is used in skin care products as well as being the original source of salicylic acid. Additionally, numerous species of birds and mammals depend on wetlands to find their food, drink water, and have a safe place to stay, particularly during their long journeys or when they're having babies.

Wetlands play a crucial and multifaceted role in mitigating climate change through their natural processes and functions. They capture carbon from the air when plants grow and trap sediment from water. This carbon gets stored in plants, leaves, soil, and mud, sometimes for thousands of years. According to an article published by A.M. Nahlik and M.S. Fennesy, worldwide, wetlands retain around 700 billion tons of carbon, mainly in peat soils, with an annual sequestration rate of 96 million tons. In the United States, it's estimated that wetlands contain 11.52 billion tons of carbon, equivalent to approximately 1% of the global soil carbon reservoir which highlights the carbon storage capacity of wetlands on a global scale.

While wetlands only cover around 5% of the Conterminous United States's land surface, they support 31% of the plant species. Through wetlands ability to absorb nutrients, they are able to be highly biologically productive (able to produce biomass quickly). Freshwater wetlands are even comparable to tropical rainforests in plant productivity. Their ability to efficiently create biomass may become important to the development of alternative energy sources.

Wetlands, beyond their ecological importance, offer a wealth of recreational opportunities, serve as invaluable educational resources, and serve as living laboratories for vital research. These unique ecosystems attract outdoor enthusiasts, providing spaces for activities like birdwatching, hiking, and photography while also serving as educational platforms where people can learn about nature and environmental conservation. Additionally, wetlands provide researchers with dynamic environments to study various ecological processes and species, contributing to our understanding of the natural world.

According to UN Climate Change News, wetlands are disappearing three times faster than forests. Wetlands are facing growing threats that put their health at risk. Urban development, pollution, land drainage, and climate change are endangering these valuable habitats that serve as essential flood buffers and wildlife havens.