What are wetlands for, anyway?

On May 25, the Supreme Court ruled 9 to 0, changing wetland protection in The Clean Water Act. The Sackett family, who took on the Environmental Protection Agency (EPA), were being fined $40,000 a day for building their Idaho property too close to an unnamed tributary. That tributary feeds into a creek, and that creek feeds into Priest Lake.
Great Lakes Now
https://www.greatlakesnow.org/2023/07/what-are-wetlands-for-anyway/