Discount codes don't stack. If you have 55% off discount, they can't also use a "free shipping" coupon since Only one discount at a time can apply to a single order at the Walmart site.

Normally, one discount code is only applied for one offer. However, If the users put a vast of items in their cart, it is easy to use one coupon code to purchase items. It depends on Walmart's policy, you can contact Walmart via mail for your reference.

Our advice for you to use Walmart Coupon effectively is to choose the right day.
Like thousands of other consumers, the time of promotion is when they choose to
shop at Walmart, so take advantage of coupons released on those days to save.

All deals from Promotion Programs of Walmart are collected here. For each certain occasion, its coupons will be on the top of the coupon list, and surely they always come with an expiry date.

Gift Cards from Walmart are usually offered on major discount days or to loyal customers. If available, it will be shown. Let's check the coupon list.