diff --git a/GitLab-CI-setup.md b/GitLab-CI-setup.md
index fb1c5a2..a6aa39f 100644
--- a/GitLab-CI-setup.md
+++ b/GitLab-CI-setup.md
@@ -12,6 +12,17 @@ Specify the following URL during runner setup: ``https://gitlab.com/ci``
 
 Use the following registration token during setup: ``yWbuZXxvWK3ypissf7bL``
 
+### Tags
+
+Please apply the following tags based on your build machine's characteristics:
+
+* ``linux`` - The builder runs on Linux
+* ``windows`` - The builder runs on Windows
+* ``bsd`` - The builder runs on FreeBSD, OpenBSD etc. (exception: macOS).
+* ``macos`` - The builder runs on Mac OS X.
+* ``fast`` - The builder is relatively fast, defined by the fact that it can run the test suite in under two hours.
+* ``amd64`` - The builder runs on a 64bit OS/CPU.
+* ``x86`` - The builder runs on a 32bit OS/CPU.
 
 ## On Windows?