A call-to-action (CTA) is a necessary part of web design that motivates visitors to take particular actions

https://www.scribd.com/document/940283427/Navigating-Client-Relationships-as-a-Freelance-Designer-136752

A call-to-action (CTA) is an essential element of website design that motivates visitors to take specific actions, such as registering for newsletters or making purchases.