In the Installation tab, you'll be able to install the Novocall widget as a traditional widget, or embedding as a link to your emails and CTA buttons.
A simple 2 minute set-up of the widget. Detailed instructions here.
Instead of installing the widget onto your website, you could also embed a "Callback Page" as a link to emails or CTA buttons.
Emails: Find out how you could use it for emails here.
You could also embed the Callback feature as an iFrame in your website.