diff --git a/README.md b/README.md
index 8c6c1fa..456427d 100644
--- a/README.md
+++ b/README.md
@@ -824,6 +824,13 @@ Ethernet simply refers to the most common type of Local Area Network (LAN) used
 
 <details>
 <summary>What is a MAC address? What is it used for?</summary><br><b>
+
+A MAC address is a unique identification number or code used to identify individual devices on the network.
+
+Packets that are sent on the ethernet are always coming from a MAC address and sent to a MAC address. If a network adapter is receiving a packet, it is comparing the packet’s destination MAC address to the adapter’s own MAC address.
+
+
+
 </b></details>
 
 <details>