With a plan for Caffè Gustoso's website in place, you turn your attention to online advertising. Although the choices seem endless, Caffè Gustoso's small budget requires that you limit your spending as much as possible. You narrow your list down to your top three online advertising choices: search advertising, online display (banner) ads, and website sponsorship. Which form of online advertising would be most useful for driving traffic to Caffè Gustoso's new locations?