diff --git a/Feature Engineering- Missing Values Day 2.ipynb b/Feature Engineering- Missing Values Day 2.ipynb
index c7cc2fb..aaf0887 100644
--- a/Feature Engineering- Missing Values Day 2.ipynb	
+++ b/Feature Engineering- Missing Values Day 2.ipynb	
@@ -1215,6 +1215,23 @@
     "sns.boxplot('Age_end_distribution',data=df)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Advantages\n",
+    "1. Easy to implement\n",
+    "2. Captures the importance of missingess if there is one\n",
+    "\n",
+    "### Dsiadvantages\n",
+    "1. Distorts the original distribution of the variale\n",
+    "2. If missingess is not importrant, it may mask the predictive power of the original variable by distorting its distribution\n",
+    "3. if the number of NA is big, it will mask the true outliers in the distribution\n",
+    "4. if the number of NA is small, the replaced NA may be considered an outlier and pre-processed in a subsequent feature engineering\n",
+    "\n",
+    "    "
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,