Pull Request Comments
In your Account Settings, you can configure Release to add comments to your Pull Requests when your environments are ready.
Access your Account Settings
At the bottom of the Account Info tab in your Account Settings, you will find your Github Settings.
Account Settings for Github
The setting Send comments from Release to Github PR's is turned on by default. When an environment is created from a Pull Request, Release will add a comment with links to the running environment.

In the comment, the name of the application (in this case release-blog) is shown, followed by links to the hostnames to preview the environment.
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