琳琳的網路寵物商店在推出多媒體廣告活動後，流量大幅成長。可惜的是，許多訪客只是瀏覽網路商店而沒有購買。 請問在建立新的多媒體廣告活動時，琳琳應選擇哪個行銷目標來重新吸引網站訪客？

The correct marketing objective is "Encourage action" because Linlin's goal is to re-engage visitors who have already shown interest by browsing but haven't purchased. This objective focuses on driving conversions, which aligns with getting visitors to complete a purchase. "Influence consideration" is incorrect because it aims to encourage users to explore products, which they've already done. "Increase leads" is incorrect as it's typically for collecting contact information, not direct sales. "Build awareness" is incorrect because it focuses on introducing the brand to new audiences, not re-engaging existing visitors.