It literally prevents the bacteria that cause urinary / kidney / bladder infections from sticking to the walls of the bladder and urinary tract. (nicolejardim.com)
Here's a video that shows how easy it is to work with: We didn't stick ours to a wall though. (theletteredcottage.net)
Mix the ingredients every hour to prevent the cheese from sticking to the walls and possibly burning. (momables.com)