The Hub Builder has many privacy and design options.
Hub access restriction settings
a) How do users enter the Hub?
Use of a passphrase (set in the Passphrase field)
Use of email address and 6-digit verification code
Combination of both previous options
b) Who can enter the Hub?
Registered Attendees (For Event Hub only)
c) More privacy settings
Allows you more advanced Hub access restrictions.
2. Hub design settings
You can customize your Hub's icon, header logo, header color and landing page.