Walmart coupons are published once Walmart announces a new discount code for a specified category or brand or a sitewide purchase. Promo codes usually last for a limited-time meaning a coupon code that worked last year might not work today. But good news, Walmart promotes coupons regularly and especially for Walmart grocery, and you can even find one for tires. On the page, you can view the latest coupon codes, with the most popular offer marked as editor's pick. You should read the terms and conditions to be sure your online order is applicable for the discount.