A call-to-action (CTA) is an essential component of web design that encourages visitors to take particular actions
https://storage.googleapis.com/eliascloud/uncategorized/making-use-of-grid-systems-for-improved-layouts-in-web-design.html
A call-to-action (CTA) is a necessary component of website design that motivates visitors to take specific actions, such as signing up for newsletters or making purchases.