Traackr, an influencer relationship management platform, conducted a study of the top 250 global travel influencers, based on their reach and relevance, and the resonance of their content. It looked at the period from Jan. 1, 2017-Dec. 31, 2017. In three categories -- travel packages, lodging and flight booking -- the study identified brand mentions and engagements, how many influencers mentioned the brands, which social media sites influencers used, and which social media sites had the most engagement. For all categories, most influencer mentions took place on Twitter, while most engagement happened on Instagram. Get the full story at Travel Weekly