diff --git a/demo_create_and_visualize_hdf5_file.ipynb b/demo_create_and_visualize_hdf5_file.ipynb
index 0ce8a0f..5722df4 100644
--- a/demo_create_and_visualize_hdf5_file.ipynb
+++ b/demo_create_and_visualize_hdf5_file.ipynb
@@ -23,8 +23,8 @@
     "\n",
     "Since we know this file was created from a Thorsten Table's format, we can use h5lib.read_mtable_as_dataframe() to read it.\n",
     "\n",
-    "Then, we rename the name column as filename, as this is the column's name use to idenfify files in subsequent functions.\n",
-    "Also, we add to the dataframe a few categorical columns to be used as grouping variables when creating the hdf5 file's group hierarchy. "
+    "Then, we rename the 'name' column as 'filename', as this is the column's name use to idenfify files in subsequent functions.\n",
+    "Also, we augment the dataframe with a few categorical columns to be used as grouping variables when creating the hdf5 file's group hierarchy. "
    ]
   },
   {
@@ -48,7 +48,10 @@
   {
    "cell_type": "markdown",
    "metadata": {},
-   "source": []
+   "source": [
+    "We now create a hdf5 file with a 3-level group hierarchy based on the input_data and three grouping functions. Then\n",
+    "we visualize the group hierarchy of the created file as a treemap."
+   ]
   },
   {
    "cell_type": "code",