diff --git a/docs/overview/setup-keys.md b/docs/overview/setup-keys.md
index 22c70325..cae43e31 100644
--- a/docs/overview/setup-keys.md
+++ b/docs/overview/setup-keys.md
@@ -49,8 +49,13 @@ Starting NetBird [v0.9.2](https://github.com/netbirdio/netbird/releases), when c
 it is possible to specify a list of auto-assign groups. Every peer registered with this key will be automatically added 
 to these groups. All the access control rules enabled for these groups will apply automatically.
 
-To add `Auto-assign groups`, open the `Setup Keys` tab and create or update any existing setup key.
+To add `Auto-assign groups`, open the `Setup Keys` tab and create or update any existing setup key. 
+The use this key to enroll new machine.
 
 <p align="center">
     <img src="/docs/img/architecture/netbird-peer-auto-tagging-newkey.png" alt="high-level-dia" width="600" style={{boxShadow: '0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19)'}} />
 </p>
+
+:::note
+Auto-assign groups will apply only to newly registered machines.
+:::
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