quotCall to Action Buttons Guidelines and Best Practices

Call to action buttons on websites are often neglected.

Designers sometimes dont understand exactly what makes a good call to action button beyond being attractive and fitting into the overall design. But call to action buttons are too important to be designed without some kind of understanding of what makes them effective

Source:
http://www.hongkiat.com/blog/call-to-action-buttons-guidelines-best-practices-and-examples/