Wetlands areas like swamps and marshes filter out pollution and sediments to purify or clean the water.

Coastal wetlands protect the land from raging seas which can erode the coastline.

Wetlands act as natural fire breaks and refuges for wildlife during fires.

Wetlands can catch lots of water during periods of heavy rain and prevent flooding of other areas.

Wetlands are the homes for many endangered species such as the orange-bellied parrot, western swamp tortoise, Tasmanian mountain shrimp and the spotted tree-frog (In Australia) 

In Australia there are about 80 migratory birds that depend on wetlands.

Many fish species depend on wetlands for breeding.

Birds that live in wetlands eat enormous amounts of insects that would destroy crops  if they weren't eaten.

Wetlands are important places for study and education.

Wetlands look good and are important for recreation.  They are used for such things as camping, boating, bird watching and swimming.

Some wetland areas are major tourist attractions.

Wetlands are an important part of supplying water to farms and agricultural areas.