Can you explain what health benefits does Stem Enhance dietary supplement have?

I'm a simple person. I got a present - Stem Enhance dietary supplement package. On the information tag it says "supports natural release of adult stem cells" But I don't even know what those stem cells do, and where they are. I took couple of pills but didn't get any result, maybe it doesn't do anything because it's expensive rip-off? So what health benefits Stem Enhance pills can give me?