Chosen Answer:

Print them and use them like you’d use any other coupon. Some companies have published coupon policies. Walmart, for example, has it posted on their website that they accept printed internet coupons. Kmart, at least all the ones near me, don’t. Actually, most stores take them, but you can check their websites or email customer support to ask before you go. If you have it in writing, either posted on the website or in an email, carry a copy of the coupon policy with you. A lot of cashiers don’t know their own policies and it’s good to have back-up.

FYI, Target has their own coupons on their website and you can use the store coupons with a manufacturer’s coupon. Walgreens will let you combine store coupons with manufacturer’s coupons too. You can double your savings that way!