Now that summer is in full swing, many of us have one thing on our minds: travel. Interest in travel-related search topics like “hotel” spikes during the hottest months of the year… …prompting travel brands large and small to battle it out for our vacation bucks. But how do the travel industry’s biggest advertisers leverage display ads to differentiate themselves? Where are they spending their money? And what types of creatives and landing pages do they use? To answer...