Full Answer

JSON-LD stands for JavaScript Object Notation for Linked Data. It is a script block embedded in your page's HTML that describes your content in terms search engines and AI systems read directly, without scraping or inference. HTTP Archive data shows JSON-LD now represents 89.4% of all structured data on the web, making it the dominant implementation format over Microdata and RDFa.

Traditional search engines already use structured data for rich results — star ratings, price ranges, FAQ dropdowns. AI search engines raise the stakes. When a user asks an AI assistant "find me a wool blanket under 0 with free shipping," the engine needs to match that query against concrete product attributes. JSON-LD Product schema supplies exactly those attributes: name, price, currency, availability, shipping details, brand, and aggregate reviews. A page without this markup forces the AI to extract the same facts from paragraph text, image alt tags, and page titles — a process that is slower, less reliable, and often incomplete.

For WooCommerce stores specifically, the gap matters because most default themes output minimal or broken schema. A detailed walkthrough of what AI engines expect from your product pages is covered in Schema Markup for WooCommerce. Getting JSON-LD right is not an SEO nicety — it is the data layer that determines whether AI search can see your inventory at all.