Your website adapted for different devices
If a potential customer can not access your site, you've lost a sale.
Many sites are not prepared for the new devices: when the users visits the web, they just can’t see anything, it takes too long to load or the navigation is awful.
Do you really think that is not important? A study by Google shows that more than 1,000,000 android devices are activated every day and, in October 2012 the number of Smartphones had already exceeded the billion.
Notice its relevance in the following graphs:

More travelers use mobile for travel Information
Percentage of travelers who use a mobile device to access Internet for travel information.
Source: The Traveler’s Road to Decision, Google and Ipsos MediaCT. July 2012.