diff --git a/routing/absent_regions_finder.hpp b/routing/absent_regions_finder.hpp
index 0f1541020..a79fad151 100644
--- a/routing/absent_regions_finder.hpp
+++ b/routing/absent_regions_finder.hpp
@@ -14,8 +14,12 @@ namespace routing
 {
 using LocalFileCheckerFn = std::function<bool(std::string const &)>;
 
-// Encapsulates generation of mwm names of absent regions needed for building the route between
-// |checkpoints|. For this purpose the new thread is used.
+/**
+ * @brief Generates a list of MWMs needed to build a route.
+ *
+ * The `AbsentRegionsFinder` class encapsulates generation of MWM names of absent regions needed
+ * for building the route between `checkpoints`. For this purpose a separate worker thread is used.
+ */
 class AbsentRegionsFinder
 {
 public:
@@ -23,7 +27,11 @@ public:
                       LocalFileCheckerFn const & localFileChecker,
                       std::shared_ptr<NumMwmIds> numMwmIds, DataSource & dataSource);
 
-  // Creates new thread |m_routerThread| and starts routing in it.
+  /**
+   * @brief Creates new thread `m_routerThread` and starts routing in it.
+   * @param checkpoints The checkpoints of the route (start, optional intermediate points, destination)
+   * @param delegate
+   */
   void GenerateAbsentRegions(Checkpoints const & checkpoints, RouterDelegate const & delegate);
 
   /**
diff --git a/routing/async_router.hpp b/routing/async_router.hpp
index d9c70f09f..26690a227 100644
--- a/routing/async_router.hpp
+++ b/routing/async_router.hpp
@@ -23,11 +23,15 @@
 namespace routing
 {
 
-/// Dispatches a route calculation on a worker thread
+/**
+ * @brief The AsyncRouter class is a wrapper class to run routing routines in a different thread.
+ *
+ * It encapsulates an `IRouter` (or subclass) instance, set with `SetRouter()`, and runs it in a
+ * separate worker thread to calculate the route.
+ */
 class AsyncRouter final
 {
 public:
-  /// AsyncRouter is a wrapper class to run routing routines in the different thread
   AsyncRouter(PointCheckCallback const & pointCheckCallback);
   ~AsyncRouter();