A Call to Action (CTA) in the context of digital marketing is an instruction to the audience designed to provoke an immediate response, typically using an imperative verb such as “call now,” “find out more,” or “visit a store today.” In online advertising, CTAs are used in ad copy or on landing pages to encourage potential customers to take a specific action, like making a purchase, signing up for a newsletter, or contacting the business. A well-crafted CTA can significantly increase the conversion rate from an ad.