Innovators have outstanding brains in their heads.
Maybe the goal of your Facebook video ad is to drive brand awareness, for example, so it was created for a cold audience. You will also see a call to action button on homepages, in the right rail or even above the nav bar.
A heatmap will let you see how often people are interacting with your call to action. And when combined with all of the advantages that digital marketing offers, they can be even more successful in driving results.
The company sells tools for helping site owners increase their conversion rates and generate more leads. Bring forms and pens and pass them out. In fact, NPR has great call to action examples all over their page.
The CTAs effectively get across the point that you can contribute to their worthy cause by either donating money or adopting an animal. A better call-to-action would be to join a running club or train for a shorter race.
The simplest example of a call to action is "Buy now! I have made this mistake in the past and regretted it.