docs: Documentation update

Change-Id: I6f916eb822a59e980e8fb1134886c3431755119c
diff --git a/helper/ndn-strategy-choice-helper.hpp b/helper/ndn-strategy-choice-helper.hpp
index 8e7e32f..29d16ae 100644
--- a/helper/ndn-strategy-choice-helper.hpp
+++ b/helper/ndn-strategy-choice-helper.hpp
@@ -48,6 +48,14 @@
 
 using ::ndn::nfd::ControlParameters;
 
+/**
+ * @ingroup ndn-helpers
+ * @brief NFD Strategy Choice Helper (FIB) helper
+ *
+ * The Strategy Choice helper interacts with the Strategy Choice manager of NFD by sending
+ * special Interest commands to the manager in order to specify the desired per-name
+ * prefix forwarding strategy for one, more or all the nodes of a topology.
+ */
 class StrategyChoiceHelper {
 public:
   static void