diff --git a/tigera-operator/.gitignore b/tigera-operator/.gitignore
new file mode 100644
index 0000000..e222e24
--- /dev/null
+++ b/tigera-operator/.gitignore
@@ -0,0 +1 @@
+tigera-operator.yaml
diff --git a/tigera-operator/README.md b/tigera-operator/README.md
index e92148f..8609429 100644
--- a/tigera-operator/README.md
+++ b/tigera-operator/README.md
@@ -1,6 +1,16 @@
-# Calico CNI
+# Calico
 
-Calico implements the inter-pod overlay network
+Calico implements
+[container network interface plugin](https://kubernetes.io/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/)
+which enables pods to talk to eachother.
+
+# For user
+
+Nothing specific to point out, this is standard Kubernetes feature
+
+# For administrator
+
+Tigera operator was used to deploy Calico:
 
 ```
 curl https://raw.githubusercontent.com/projectcalico/calico/v3.28.0/manifests/tigera-operator.yaml -O