You can perform the following: Update Plugins Update Themes Edit Core Files Install new Plugins Install new Themes Develop Site Update WordPress Cor...

A stage or staging environment is an environment for testing that looks exactly like the production environment. It’s a complete but independent copy of the...

Your staging site will be on BlogVault servers.

Yes

No. The staging site is not public and needs authentication before it can be accessed.

Yes, you can.

If you give them access, your client can modify plugins or posts and you as the admin can decide to push over the content by clicking one button.

No. Google cannot index your staging site so you will not face any SEO issues.

Yes, you can.

Yes, you can.