There are currently over 50 million people in the United States alone that have smartphones and thankfully there are a lot of ways that you can increase your businesses exposure on them. The first service that comes to mind is text message marketing, or SMS marketing, but that is just the beginning. There is mobile search engine optimization, and mobile websites, that allow for increased user experience for smartphone users.
Search Engine traffic is greatly influenced by mobile versions of search engines that display their listings differently
Importance of and different aspects, etc