To make a SharePoint site public, we can navigate to the site and add "everyone" to the site visitors group. This will make the site public within the organization. If we want to make the site public to external users, we need to add them as guests first. We can also change the site's privacy settings from private to public by going to the site information page and selecting the option to change the privacy settings. However, You can't make a SharePoint Online site as a Public internet site!