Sam (@samiamdean), who said she works in the tech industry, shared that developers often forget to turn off the codes they use when running tests on shopping websites or apps. Their forgetfulness ...

There are three basic types of Etsy coupons, good for qualifying merchandise or entire orders from a particular shop.

Looking to build a website? Squarespace offers powerful tools, stunning templates and 10% off with code USATODAY10. Learn about features, cost, tips.

Search for discount codes Most websites will have a section where you can enter a discount code to save money on your order.

7 Browser Extensions for Easily Finding Coupons Searching for promo codes yourself is a waste of time. Download a browser extension for shopping and let it find the deals for you, in seconds.

These Squarespace promo codes can save you extra cash on your new website or domain.

Coupons at Checkout works in a similar way. When you’re checking out at a shopping website, the add-on scours the internet to look for voucher codes which can be applied to your order.

Kyle James, the founder of the coupon website, Rather-Be-Shopping.com, says he's cracked the code to help predict if something you're buying might be marked down later.