Amazon.com has coupons. You may have seen a random coupon here or there while shopping for toothpaste or sunblock, but there's actually an entire section of Amazon that's dedicated to coupons and it's not just for groceries and household goods. You can find coupons for electronics, pet supplies, toys, and other items.
To get started with Amazon coupons, go to Amazon.com, then click on the link at the top for "Today's Deals.". In the menu of subitems, click on "Coupons.". You can also use this direct link.
Amazon usually doesn't offer coupon codes. However, you can still save money on your next Amazon purchase. The easiest way is to get free shipping with Amazon Prime. If you're a student, you can save 50% off their annual membership fee and you also get your first six months free!
To find promo codes: Type “amazon coupon codes” or “amazon promo codes” into your search engine of choice (one will most likely find results for the other). Then click on a link like the ones highlighted in the screenshot below.