diff --git a/api/writer.go b/api/writer.go
index 953d7d7..4cfc8b2 100644
--- a/api/writer.go
+++ b/api/writer.go
@@ -2,6 +2,8 @@ package api
 
 // Writer interface defines the required methods
 // to send messages over an channel.
+//
+// This is a low-level interface typically implemented by backend drivers
 type Writer interface {
 	// Write writes a message over a channel.
 	// The message may or may not be buffered depending on the implementation.