How do you convince web visitors to become a lead and eventually a customer? Too often, marketers focus on their marketing efforts, landing pages, and sign-up forms as the three pillars of conversion optimization. And while these three factors are undoubtedly crucial to your efforts, a fourth matters just as much: the call to action button. Done wrong, few member of your audience will ever even see your sign up form. Done right, it can vault your lead generation efforts and conversion percentage to new heights.