diff --git a/content/collections/extending-docs/data.md b/content/collections/extending-docs/data.md
index ec3ee428b..4a7bba64d 100644
--- a/content/collections/extending-docs/data.md
+++ b/content/collections/extending-docs/data.md
@@ -268,3 +268,44 @@ $entry->toAugmentedCollection(['title', 'collection']);
 ```
 
 The `toAugmentedArray` method does the same as `toAugmentedCollection`, except that it returns an array.
+
+
+### Checking for data changes
+
+Statamic provides the `isDirty`, `isClean`, and `getOriginal` methods so you can determine what data has changed from when the item was originally retrieved.
+
+The `isDirty` method checks if any of the item's data has been changed since it was last saved. You may pass a specific attribute name or an array of attributes to the `isDirty` method to determine if any of the attributes are "dirty". The `isClean` method will determine if an attribute has remained unchanged since the item was retrieved. This method also accepts an optional attribute argument:
+
+```php
+$entry->title; // "Post title"
+$entry->image; // "/path/to/image.jpg"
+
+$entry->title = 'New Title';
+
+$entry->isDirty(); // true
+$entry->isDirty('title'); // true
+$entry->isDirty('image'); // false
+$entry->isDirty(['image', 'title']); // true
+
+$entry->isClean(); // false
+$entry->isClean('title'); // false
+$entry->isClean('image'); // true
+$entry->isClean(['image', 'title']); // false
+ 
+$entry->save();
+ 
+$entry->isDirty(); // false
+$entry->isClean(); // true
+```
+
+The `getOriginal` method returns an array containing the original attributes of the item regardless of any changes to the item since it was retrieved. This method also accepts an optional attribute argument:
+
+```php
+$entry->title; // "Post title"
+$entry->image; // "/path/to/image.jpg"
+
+$entry->title = 'New Title';
+ 
+$entry->getOriginal('title'); // "Post title"
+$entry->getOriginal(); // ["Post title", "/path/to/image.jpg"]
+```