diff --git a/CUSTOMIZE.md b/CUSTOMIZE.md
index 0bf9e692e581..ffe37f075136 100644
--- a/CUSTOMIZE.md
+++ b/CUSTOMIZE.md
@@ -1,6 +1,6 @@
 # Customize
 
-Here we will give you some tips on how to customize the website.
+Here we will give you some tips on how to customize the website. One important thing to note is that **ALL** the changes you make should be done on the **main** branch of your repository. The `gh-pages` branch is automatically overwritten every time you make a change to the main branch.
 
 ## Project structure