Merge pull request segmentio#6126 from segmentio/Panandhan22-patch-9

Segment's data flow to destination.

Author: forstisabella

src/connections/destinations/index.md

@@ -125,6 +125,8 @@ To add a Destination:
 
 Segment increases deliverability to destinations in two ways: [retries](#retries) and [replays](/docs/guides/what-is-replay/). Retries happen automatically for all customers, while replays are available on request for [Business](https://segment.com/pricing/) customers.
 
+**Note:** Segment's data flow is primarily unidirectional, from Segment to integrated destinations. Segment does not inherently support a bidirectional flow where events, once delivered and processed by a destination, are sent back to Segment.
+
 ### Retries
 
 #### Retries in Segment's client libraries
@@ -176,4 +178,4 @@ You can see the current destination endpoint API success rates and final deliver
 
 ### IP Allowlist 
 
-{% include content/ip-allowlist.md %}
+{% include content/ip-allowlist.md %}