I have a rule of never installing anything unless I really need it and even then, I think about it for a day or so after which I often decide I don't need it.
Do you need this software?
It seems (I may be wrong) that you aren't fully sure what it does. That would be a good enough reason for me to ignore.
The software itself can be termed scareware. It will give you huge amounts of information, most of which you don't need to know and it may even offer advice on how to rectify all the things that it's found "wrong" with your machine. Some people, after carrying out these instructions end up with a dead machine whereas before it was working OK.
If your machine is working the way you want it to, that's the way it should be. If it isn't working the way you want, it would be far better, and cheaper, to come here for advice rather than rely on anything that program tells you.
ZILLIONS upon zillions of computers work perfectly OK without the "benefits" of this software. Your will as well.