Product listing ads (PLAs) are search ads that include concise product information such as product image, price and merchant name without relying solely on text ads to entice online shoppers. PLAs are proving that a picture is truly worth a thousand (key) words, as they're consistently driving increased clickthrough rates and conversions. Given that the holiday season is quickly approaching, it's now more important than ever for merchants to understand how to maximize PLAs. Here are some tips on how to most effectively use PLAs this holiday season.