Platform docs: Add a page to explain how to render HTML from a list of blocks

platform-docs/docs/basic-concepts/rendering.md

@@ -3,3 +3,38 @@ sidebar_position: 8
 ---
 
 # Rendering blocks
+
+## HTML Serialization and Parsing
+
+After editing your blocks, you may choose to persist them as JSON or serialize them to HTML.
+
+Given a block list object, you can retrieve an initial HTML version like so:
+
+```js
+import { serialize } from '@wordpress/blocks';
+
+const blockList = [
+    {
+        name: 'core/paragraph',
+        attributes: {
+            content: 'Hello world!',
+        },
+    },
+];
+
+const html = serialize( blockList );
+```
+
+If needed, it is also possible to parse back the HTML into a block list object:
+
+```js
+import { parse } from '@wordpress/blocks';
+
+const blockList = parse( html );
+```
+
+## Going further
+
+Some of the customizations that the core blocks offer, like layout styles, do not output the necessary CSS using the `serialize` function. Instead in the editor, an additional style element is appended to the document head. This is done to avoid bloating the HTML output with unnecessary CSS.
+
+We're currently working on providing a utility that allows you to render blocks with all the necessary CSS.