From f86ecdfe860e15b50844cbf7c49e5bbbdfb3b560 Mon Sep 17 00:00:00 2001
From: Shohei Ueda <30958501+peaceiris@users.noreply.github.com>
Date: Sat, 27 Jun 2020 22:42:01 +0900
Subject: [PATCH] docs: Add use case (#371)

A GitHub Free Plan account cannot use the GitHub Pages in a private repository. To make your source contents private and deploy it with the GitHub Pages, you can deploy your site from a private repository to a public repository using the external_repository.
---
 README.md | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index a5f366c..c95779e 100644
--- a/README.md
+++ b/README.md
@@ -346,7 +346,14 @@ For example:
 You can use `deploy_key` or `personal_token`.
 When you use `deploy_key`, set your private key to the repository which includes this action and set your public key to your external repository.
 
-**Be careful, `GITHUB_TOKEN` has no permission to access to external repositories. Please create a personal access token and set it to `personal_token` like `personal_token: ${{ secrets.PERSONAL_TOKEN }}`.**
+**Note that `GITHUB_TOKEN` has no permission to access to external repositories. Please create a personal access token and set it to `personal_token` like `personal_token: ${{ secrets.PERSONAL_TOKEN }}`.**
+
+Use case: 
+
+A GitHub Free Plan account cannot use the GitHub Pages in a private repository. To make your source contents private and deploy it with the GitHub Pages, you can deploy your site from a private repository to a public repository using this option.
+
+- `peaceiris/homepage`: A private repository running this action with `external_repository: peaceiris/peaceiris.github.io`
+- `peaceiris/peaceiris.github.io`: A public repository using GitHub Pages
 
 ### ⭐️ Force orphan