The take home thing is a vial into which you put a stool sample and mail it back. Then it gets tested for signs of colon cancer. I've seen them advertised on TV as well.
If that tests positive then you get a colonoscopy to check more things. If you have had colon cancer then you get a full colonscopy evry two years and an MRI every year.
If this test finds something then the next step is not treatment it is you need a colonoscopy.
It is a test that cuts down on the number of colonoscopies needed and is cheap enough to find problems earlier than everyone having a colonoscopy which is just unaffordable,