For sending out surveys to people other than the existing CRM records, or to send surveys using a web-link, use the shareable web link feature.
To generate a shareable link, you can navigate to Detail view of that survey and click on ‘Get Shareable Link’ button.
This will generate a shareable web link, which you can post on Social Medias or share with people to get responses online.
You can also directly copy survey link from the list view of surveys shown in the Survey Module by clicking on Copy Survey Link icon.