Forget about Call To Action
As the name suggests, Call To Action or CTA are call to action buttons. In other words, they are buttons that will prompt the user to perform an action such as filling out a contact form, subscribing to a newsletter, adding an item to a cart or creating an account.
CTA buttons must be well placed on the site, some in the menu like a contact or registration button and others must be in the body of the page.
As important as their location, the color of the CTAs plays an important role. Indeed, as we have seen above, colors have a meaning and therefore, if you put a red button and a blue button next to each other, the user will click on the red one because his eye will be attracted to it first.