ATK is an online retail store. The shopping process follows the pattern most e-commerce sites use: you browse, add items to a basket, then move to a checkout page where you confirm what you are buying, enter delivery and payment details, and place the order. No product catalogue details are stated for ATK, so treat the store as a general online shop rather than assuming it specialises in any particular category.
The part of that process that matters for discounts is the order summary. This is the panel that lists your items, the goods subtotal, any delivery charge and the final amount payable. On a desktop screen it usually sits beside or below the basket contents. On a mobile screen it is often collapsed behind a 'Show order summary' toggle, which you need to tap before you can see the individual lines.
A percentage code reduces the goods total by a set proportion of the eligible items in your basket. It is not store credit, and it is not a rebate paid back later. The reduction happens on screen, before you pay.
Because the saving is proportional, it scales with the size of the order. A £40 basket becomes £30, and a £120 basket becomes £90. That is the main practical difference between a percentage code and a fixed-amount voucher: the bigger the eligible spend, the larger the cash saving.
The code for ATK is 25OFF, which applies a 25% discount. It goes into the discount code field found in the order summary, either on the cart or basket page or on the checkout page itself. There is nothing to activate in advance and nothing to click before you shop; the code only does anything once there are items in the basket for it to reduce.
The sequence to follow is:
Browse ATK and add items to the basket before trying to apply a code.
Open the basket, or proceed to checkout.
Locate the discount code field in the order summary, expanding the summary first if you are on mobile.
Type 25OFF and select Apply rather than pressing Enter.
Check that a discount row appears and that the total falls by 25% of the eligible subtotal.
Enter delivery and payment details and place the order.
If you are creating an ATK account as part of checkout, apply the code after the account step rather than before it.
Percentage codes usually come with conditions, and several common ones are worth knowing before you shop:
Sale, clearance, bundle, gift card and new release items are often excluded.
If your basket mixes eligible and excluded items, the 25% may apply only to the eligible portion, so the headline figure will not match the drop in your total.
Some percentage codes require a minimum spend. Whether ATK sets one for this code is not stated.
Codes rarely stack with an existing site-wide sale or another voucher, and usually only one code can be applied at a time.
The discount reduces the goods total; delivery is charged separately.
Many codes are limited to one use per account.
One knock-on effect catches beginners out: discounting the basket can push the total below a free-shipping threshold, so the postage cost reappears and eats into the saving.
Codes are normally case-insensitive, so capitalisation is not the issue, but a trailing space copied along with the text can cause a failure. Retype the code by hand, remove any other code already sitting in the field, check whether your items fall into an excluded group, confirm you are on the correct regional storefront, and try again in a private browser window.
The exact exclusions, any minimum spend, stacking rules, shipping charges and per-customer limits for ATK are not stated here and should be checked on the store's own terms or promotions page. The reliable test is the order summary itself: if the discount row is visible and the total has fallen by a quarter of the eligible subtotal, the code has done its job.
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