Concepts

Concepts explain how Thor behaves across APIs.

Use this section when you are trying to understand:

• how query strings filter search results
• how product discounts, cart discounts, discount codes, and discount groups work together
• how cart predicates decide whether a checkout rule applies
• how product predicates decide which prices a discount targets
• how Storefront media URLs can request optimized image variants

These guides are shared building blocks for both the Admin API and the Storefront API.

Start with one of these:

• Query language
• Discounts
• Image optimization
• Cart predicate language
• Product predicate language