Call to Action (CTA) is a call to action used in online marketing
. This triggering of an action is used in TV advertising, print advertising and online advertising to increase sales. The TV viewer, the reader of a newspaper or the visitor of a website should become active and is animated to a certain action. For example, he should dial a certain phone number, buy a certain product, download a software, register for a test drive at a certain car dealer or participate in a contest.