You're creating a video ad for a spa and your goal is to drive reservations through the spa's website. Which call-to-actions (CTAs) should you use in the ad?

Book now" is the most effective CTA because it directly aligns with the goal of driving reservations. It clearly instructs users on the desired action and implies an immediate transaction. "Call now" might lead to reservations, but it's a different action than driving traffic to the website for booking. "Learn more" is too general and doesn't push for a conversion; it suggests further exploration rather than a direct booking. "Check us out" is even more vague and less action-oriented, providing no clear next step for the user to achieve the reservation goal.