Update l4sQueueType description based on Herbert's feedback. Includes…

… what L4S is, queue type descriptions, and link to RFC9330

code/API_definitions/qos-profiles.yaml

@@ -345,7 +345,23 @@ components:
             - non-l4s-queue
             - l4s-queue
             - mixed-queue
-          description: Specifies the type of queue for L4S traffic management
+          description: |
+            Specifies the type of queue for L4S (Low Latency, Low Loss, Scalable Throughput) traffic management. L4S is an advanced queue management approach designed to provide ultra-low latency and high throughput for internet traffic, particularly beneficial for interactive applications such as gaming, video conferencing, and virtual reality.
+
+            **Queue Type Descriptions:**
+
+            - **non-l4s-queue**:
+              A traditional queue used for legacy internet traffic that does not utilize L4S enhancements. It provides standard latency and throughput levels.
+
+            - **l4s-queue**:
+              A dedicated queue optimized for L4S traffic, delivering ultra-low latency, low loss, and scalable throughput to support latency-sensitive applications.
+
+            - **mixed-queue**:
+              A shared queue that can handle both L4S and traditional traffic, offering a balance between ultra-low latency for L4S flows and compatibility with non-L4S flows.
+
+          externalDocs:
+            description: For more details, refer to the L4S standard.
+            url: https://datatracker.ietf.org/doc/rfc9330/
         differentiatedServicesCodepoint:
           type: string
           description: |