If you listen to the news media you may be planning a purchase of lake front property on Mars. However, NASA and others involved in the search for water on Mars are WAY more reserved in what they are saying.
Long wave radar has found what may be… moisture… a mile or two below the surface. Whether it is a body of water or mud or something else has yet to be determined. The problem with knowing is from our testing on Earth. The radar returns on Mars look similar to those we find when looking at salty water deep in the Earth. But, we also know other materials return similar signals. More study will sort out what is down there. Study has narrowed the possibilities of what may be there with the probability high it is water in some amount and form.
Much of the NASA press release information is targeted at keeping Americans enthusiastic about space exploration. It is a funding thing. I think we should be funding NASA and space exploration. But, I also acknowledge the spin NASA puts in their press releases and what the media does with the news.
No one will be buying Martian lake front property, water skies, or lawn sprinklers in the foreseeable future.