Travel companies are taking digital marketing approach, including a content strategy across platforms such as blogs, newsletters, dynamic websites and social media management. It is important for travel companies to get maximum people talking about them, mention them in pictures, even if people are not following the company on Twitter or Facebook? The answer is use of hash tags!  Frederic Gonzalo (Owner/Partner, Gonzo Marketing), explain the theory around the utilization of hash tags in destination marketing in his article link:  http://www.socialmediatoday.com/content/hashtags-coming-alive-destination-marketing