Tourism is one of the sectors that has changed the most in the world in recent decades. In countries such as Spain, it is clearly the most dynamic sector with the most growth in general, driven by the professionalization of functions and the incorporation of specific technologies. This radical change is not only given from within the sector but also from outside, subject to the push that the internet represents and changes in consumer habits. Unlike what happened a few years ago - when customers went to travel agencies - the client is currently an active part in the process of searching, planning and booking their trips and services through the Internet, without any need to resort to intermediaries. The volatility of prices caused by the immediacy of the new online agencies, the overwhelming offer of hotel beds, low-cost flights has generated a generalized increase in global tourism and, consequently, have made the competitiveness of the entire sector grow.... [-]