Before you start using Call-To-Action for driving traffic on other's content from other webpage.
First we need to design and customize the Call-To-Action.
Customize by selecting the "CTA Overlay" option from the sidebar of your dashboard or use this link.
Select the type of CTA you want to create, name it and design it in any combination to match your preference then click the create button to save the CTA.
Footnote : Common used options are CTA Message and CTA Coupon .