Hi Afshin,
Thanks for reaching out and thanks for using BoldGrid Cloud WordPress! Our Cloud WordPress services are not meant for production purposes so there are limitations on what you are able to do with your “cloud instances”.
These sites should be used for staging and development purposes only. If you wish to incorporate “Pinterset” meta such as verification tags you’ll need to consult with a Web Host, set up server space and configure WordPress. After doing so you can migrate the staging site over to a live production area in order to achieve this.
I hope this helps. Please reach back out if you have any other questions for us.