Websites used for staging, are accessible to the public so they are indexed by search engines like Google.
One of the issues with indexing these websites is that they will appear in search results, so your customers can be lead to your staging website instead of your official website.
DHD recommends you take the following step to prevent staging websites becoming indexed by Google:
Add the following to the robots.txt file of the staging site:
‘*’ means all
‘/’ is the root directory
This action will stop all robots from crawling the site