If you wish to have parts of your Portfolio site password protected/prevented from being publicly accessible, you can password protect your entire site, individual Galleries, Pages, and Sub-pages with different passwords.
If you set different passwords for your entire site, Galleries, and Sub-pages, you will need to enter the password for the respective page/URL you are trying to access. For example, if you have a site-specific password and share the URL of a Gallery page that is also password protected, visitors will need to enter the Gallery-specific password to enter that page.
Note: Portfolio sites and pages that are password protected from initial publish will not be indexed by search engines until the password is removed. Additionally, passwords are cached (saved) for 30 minutes per browsing session.