diff --git a/README.md b/README.md
index 0bf51c7..eb632d1 100644
--- a/README.md
+++ b/README.md
@@ -108,6 +108,13 @@ Here is a sample `hive.nix` with two nodes, with some common configurations appl
     # Override the default for this target host
     deployment.replaceUnknownProfiles = false;
 
+    # You can filter hosts by tags with --on @tag-a,@tag-b.
+    # In this example, you can deploy to hosts with the "web" tag using:
+    #    colmena apply --on @web
+    # You can use globs in tag matching as well:
+    #    colmena apply --on '@infra-*'
+    deployment.tags = [ "web" "infra-lax" ];
+
     time.timeZone = "America/Los_Angeles";
 
     boot.loader.grub.device = "/dev/sda";