docs: excerpt

docs/content/3.guide/1.writing/2.markdown.md

@@ -71,6 +71,34 @@ description: 'meta description of the page'
 
 When used together with [`<ContentDoc>`](/guide/displaying/rendering#contentdoc-) or the [document-driven mode](/guide/writing/document-driven) to display the current page, the [`useContentHead() composable`](/api/composables/use-content-head) will be used to set the page's metadata.
 
+
+## Excerpt
+
+Content excerpt or summary can be extracted from the content using `<!--more-->` as a divider.
+
+```md
+---
+title: Introduction
+---
+
+Learn how to use @nuxt/content.
+<!--more-->
+Full amount of content beyond the more divider.
+```
+
+Description property will contain the excerpt content unless defined within the Front Matter props.
+
+Example variables will be injected into the document:
+
+```json
+{
+  "_id": "content:index.md"
+  "excerpt": Object
+  "body": Object
+  // ... other keys
+}
+```
+
 ## Code Highlighting
 
 Code highlighting allows you to display beautiful code blocks in your website.