# JSON-LD JavaScript Object Notation for Linked Data — Google's preferred JSON-based format for embedding Schema.org structured data into a page. **JSON-LD (JavaScript Object Notation for Linked Data)** is a JSON-based format used to embed structured data (schema markup) into a web page. It is the structured data format officially recommended by Google. Advantages of JSON-LD: - Independent of HTML markup, it is added as a single ` ``` Multiple schema types can be combined in a single block using `@graph`. **Tip:** Validate every JSON-LD you publish with Google’s “Rich Results Test” tool. Invalid structured data does not generate rich snippets and rarely results in a penalty.