Never assume that new users on your website will know what action you want them to take. As the owner of the site, you need to provide them with appropriate clues.
If you have an e-Commerce site, you want them to click the “Add to Cart” button. If your site is there to generate sales leads you want them to click the “Contact Us” button. If you run a social networking website your goal should be for them to click “Join Now”. These are your “Call to Action” (CTA) buttons. So what makes a good Call to Action?