You can require visitors to enter a password to access a landing page or website page. The appearance of the password prompt page is set by its template, which can be accessed from your website settings.
The pages you can set passwords for depend on your HubSpot subscription:
Website pages: only accounts with aCMS Hub Professional or Enterprise subscription can password protect website pages.
Landing pages: only accounts with aMarketing Hub Professional or Enterprise, or CMS HubProfessional or Enterprise subscription can password protect landing pages.