diff --git a/notebooks/trajectory-trends_tutorial.ipynb b/notebooks/trajectory-trends_tutorial.ipynb
index 60e53c0..4fb0593 100644
--- a/notebooks/trajectory-trends_tutorial.ipynb
+++ b/notebooks/trajectory-trends_tutorial.ipynb
@@ -335,6 +335,14 @@
     ")"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "305b26b4-8442-48a9-81d3-c3db48eb6417",
+   "metadata": {},
+   "source": [
+    "Consider setting the length scale parameter `ls` to tailor the smoothness of the inferred trends over pseudotime to match the variability within your dataset."
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "5718d81f",