diff --git a/pkg/kgo/client.go b/pkg/kgo/client.go
index 90024b7c..8039aa6d 100644
--- a/pkg/kgo/client.go
+++ b/pkg/kgo/client.go
@@ -86,7 +86,11 @@ func stddial(ctx context.Context, addr string) (net.Conn, error) {
 }
 
 // NewClient returns a new Kafka client with the given options or an error if
-// the options are invalid.
+// the options are invalid. Connections to brokers are lazily created only when
+// requests are written to them.
+//
+// NewClient also launches a goroutine which periodically updates the cached
+// topic metadata.
 func NewClient(opts ...Opt) (*Client, error) {
 	cfg := defaultCfg()
 	for _, opt := range opts {