Add description to the Example Object

Author: handrews

versions/3.0.4.md

@@ -1997,6 +1997,10 @@ transactionCallback:
 ```
 
 #### <a name="exampleObject"></a>Example Object
+An object grouping an internal or external example value with basic `summary` and `description` metadata.
+This object is typically used in properties named `examples` (plural), and is a [referenceable](#referenceObject) alternative to older `example` (singular) fields that do not support referencing or metadata.
+
+Allows sharing an example to demonstrate the usage of properties, parameters and objects within OpenAPI.
 
 ##### Fixed Fields
 Field Name | Type | Description