Social media sites such as YouTube, Twitter, and Facebook allow K-pop artists to reach a global audience and to communicate readily with their fans. As global online music market revenue increased 19% from 2009 to 2014 with social media, music consumers around the world are more likely to be exposed to K-pop. K-pop idol groups benefit from video-based social media such as YouTube since visual components such as dance and fashion are essential factors in their performance. The number of searches of "K-pop" on YouTube increased by a factor of 33 from 2004 to 2014. Through social media advertisement, Korean entertainment companies narrowed the cultural gap so K-pop could enter the global market and gain recognition among overseas consumers. The export of K-pop dramatically increased from US$13.9 million to US$204 million between 2007 and 2011. Social media also changes the consumption patterns of K-pop music. Before the digital era, people would purchase and consume music products on an individual basis. Consumers now actively participate in sharing music products and advertising their favorite artists, which is advantageous for K-pop.