diff --git a/README.md b/README.md
index 4a2b73c..fb18ab1 100644
--- a/README.md
+++ b/README.md
@@ -8,3 +8,5 @@ certain dependencies are expected to already be present on the system you are co
 These are:
 - gRPC itself (be aware of potential consequences of installing gRPC globally; installation through a package manager or into a custom install location are recommended; see root CMakeLists.txt to configure a custom location)
 - Abseil (required by gRPC)
+
+This simple service provides a Hello World client and server, as well as the corresponding build system. The server is implemented as a callback server, which you can read more about [here](https://grpc.io/docs/languages/cpp/callback/); it is currently (2025) the preferred way of implementing a gRPC server.