The fastest way to earn points is to use Samsung Pay wherever you shop! They have frequent promotions where you can earn double or triple points as well. You can use it through your Samsung phone or a Samsung watch like the Gear S3. It's tied to whatever credit/debit card you set if with. It's actually safer than using a debit card! You can also earn points by buying Samsung products through the Samsung website.
How do I use my points?
From inside Samsung Pay you can click on redeem points and use them directly.
Or you can use the "Shop Samsung" app and apply points as partial or full payment on items that you purchase.