diff --git a/public/index.html b/public/index.html
index 31267c2..cf4b29e 100644
--- a/public/index.html
+++ b/public/index.html
@@ -327,7 +327,7 @@ <h3>Probability of Improvement (PI)</h3>
     </p>
 
     <p class='check'>
-      Below is an image.
+      The visualization below tries to show the way Pi is calculated. The orange line represents the <d-math>f(x^+ + \epsilon)</d-math> we have been talking about earlier. The portion of probability density that has not been clipped by this line in a way represents the PI value at that location. It is this specific value that represents the "probability of improvement over current max".
     </p>
 
     <figure>