In order to easily deploy your survey on your website, you have to set up your Domains.
It allows you to generate your Deployment tag then.
To add a Domain, please click on Settings in the Menu. In the Deployment category, click on Domains and then on the green button "Add domain":
Fill your Name and Domain and Save your changes.
Your domain is now ready to use on your next deployment. Select your default Domain in your Domains list by switching the cursor to ON.
Please check your Deployment tag is set up correctly on your website.