From Manage Website, click the button that says "Make Website Visible." Congrats, your website is public!
When this is set to "Hide Website" no one can visit your website and it is private.
You can control if you want your website to show up in Google search or Zola search from your account settings under Privacy:
Read more about search engine (ex. Google) settings here.
If you so choose, you can make your website password-protected. Read more about password protection here.